Attachment 371692 Details for Bug 198695 – Patch

[patch] Patch

bug-198695-20190608184055.patch (text/plain), 323.53 KB, created by Said Abou-Hallawa on 2019-06-08 18:40:57 PDT

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Creator: Said Abou-Hallawa

Created: 2019-06-08 18:40:57 PDT

Size: 323.53 KB

patch

obsolete

>Subversion Revision: 246234
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 0b9937c8bb59b35ff1fbb6aa2c9333f31d23f1d5..664533ec1c3273008422b3a6efa352b5a09140f5 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,422 @@
>+2019-06-08  Said Abou-Hallawa  <said@apple.com>
>+
>+        Make it possible to mark the value of an SVGProperty as 'Invalid'
>+        https://bugs.webkit.org/show_bug.cgi?id=198695
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        SVGProperty can be initialized with the default value. Or it can be set
>+        to the default value as a fall back of parsing error. Marking the state
>+        to 'Invalid' will allow differentiating between these two cases.
>+
>+        * svg/SVGElement.cpp:
>+        (WebCore::SVGElement::commitPropertyChange):
>+        * svg/SVGFitToViewBox.cpp:
>+        (WebCore::SVGFitToViewBox::SVGFitToViewBox):
>+        (WebCore::SVGFitToViewBox::setViewBox):
>+        (WebCore::SVGFitToViewBox::resetViewBox):
>+        * svg/SVGFitToViewBox.h:
>+        (WebCore::SVGFitToViewBox::setPreserveAspectRatio):
>+        (WebCore::SVGFitToViewBox::hasValidViewBox const):
>+        (WebCore::SVGFitToViewBox::hasEmptyViewBox const):
>+        (WebCore::SVGFitToViewBox::resetPreserveAspectRatio):
>+        * svg/SVGRect.h:
>+        (WebCore::SVGRect::create):
>+        * svg/properties/SVGAnimatedDecoratedProperty.h:
>+        * svg/properties/SVGAnimatedPrimitiveProperty.h:
>+        * svg/properties/SVGAnimatedProperty.h:
>+        (WebCore::SVGAnimatedProperty::state const):
>+        (WebCore::SVGAnimatedProperty::setState):
>+        (WebCore::SVGAnimatedProperty::isDirty const): Deleted.
>+        (WebCore::SVGAnimatedProperty::setDirty): Deleted.
>+        * svg/properties/SVGAnimatedPropertyList.h:
>+        * svg/properties/SVGAnimatedPropertyPairAccessorImpl.h:
>+        * svg/properties/SVGAnimatedValueProperty.h:
>+        (WebCore::SVGAnimatedValueProperty::SVGAnimatedValueProperty):
>+        * svg/properties/SVGProperty.h:
>+        (WebCore::SVGProperty::state const):
>+        (WebCore::SVGProperty::setState):
>+        (WebCore::SVGProperty::synchronize):
>+        (WebCore::SVGProperty::SVGProperty):
>+        (WebCore::SVGProperty::isDirty const): Deleted.
>+        (WebCore::SVGProperty::setDirty): Deleted.
>+        * svg/properties/SVGValueProperty.h:
>+        (WebCore::SVGValueProperty::SVGValueProperty):
>+
>+2019-06-08  Said Abou-Hallawa  <said@apple.com>
>+
>+        Remove the non final propertyRegistry() from the SVG base classes
>+        https://bugs.webkit.org/show_bug.cgi?id=198122
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This saves the memory that is taken by the member SVGPropertyRegistry of
>+        the base class. propertyRegistry() is only needed for concrete classes.
>+
>+        * svg/SVGAElement.h:
>+        * svg/SVGAltGlyphDefElement.h:
>+        * svg/SVGAltGlyphElement.h:
>+        * svg/SVGAltGlyphItemElement.h:
>+        * svg/SVGAnimationElement.h:
>+        * svg/SVGCircleElement.h:
>+        * svg/SVGClipPathElement.h:
>+        * svg/SVGComponentTransferFunctionElement.h:
>+        * svg/SVGCursorElement.h:
>+        * svg/SVGDefsElement.h:
>+        * svg/SVGDescElement.h:
>+        * svg/SVGElement.h:
>+        (WebCore::SVGElement::propertyRegistry const): Deleted.
>+        * svg/SVGEllipseElement.h:
>+        * svg/SVGExternalResourcesRequired.h:
>+        * svg/SVGFEBlendElement.h:
>+        * svg/SVGFEColorMatrixElement.h:
>+        * svg/SVGFEComponentTransferElement.h:
>+        * svg/SVGFECompositeElement.h:
>+        * svg/SVGFEConvolveMatrixElement.h:
>+        * svg/SVGFEDiffuseLightingElement.h:
>+        * svg/SVGFEDisplacementMapElement.h:
>+        * svg/SVGFEDropShadowElement.h:
>+        * svg/SVGFEFloodElement.h:
>+        * svg/SVGFEGaussianBlurElement.h:
>+        * svg/SVGFEImageElement.h:
>+        * svg/SVGFELightElement.h:
>+        * svg/SVGFEMergeElement.h:
>+        * svg/SVGFEMergeNodeElement.h:
>+        * svg/SVGFEMorphologyElement.h:
>+        * svg/SVGFEOffsetElement.h:
>+        * svg/SVGFESpecularLightingElement.h:
>+        * svg/SVGFETileElement.h:
>+        * svg/SVGFETurbulenceElement.h:
>+        * svg/SVGFilterElement.h:
>+        * svg/SVGFontFaceElement.h:
>+        * svg/SVGFontFaceFormatElement.h:
>+        * svg/SVGFontFaceNameElement.h:
>+        * svg/SVGFontFaceSrcElement.h:
>+        * svg/SVGFontFaceUriElement.h:
>+        * svg/SVGForeignObjectElement.h:
>+        * svg/SVGGElement.h:
>+        * svg/SVGGeometryElement.h:
>+        * svg/SVGGlyphElement.h:
>+        * svg/SVGGradientElement.h:
>+        * svg/SVGGraphicsElement.h:
>+        * svg/SVGHKernElement.h:
>+        * svg/SVGImageElement.h:
>+        * svg/SVGLineElement.h:
>+        * svg/SVGLinearGradientElement.h:
>+        * svg/SVGMPathElement.h:
>+        * svg/SVGMarkerElement.h:
>+        * svg/SVGMaskElement.h:
>+        * svg/SVGMetadataElement.h:
>+        * svg/SVGMissingGlyphElement.h:
>+        * svg/SVGPathElement.cpp:
>+        (WebCore::SVGPathElement::getTotalLength const):
>+        (WebCore::SVGPathElement::getPointAtLength const):
>+        (WebCore::SVGPathElement::getPathSegAtLength const):
>+        * svg/SVGPathElement.h:
>+        * svg/SVGPathUtilities.cpp:
>+        (WebCore::pathSegAtLengthFromSVGPathByteStream):
>+        (WebCore::totalLengthOfSVGPathByteStream):
>+        (WebCore::pointAtLengthOfSVGPathByteStream):
>+        (WebCore::getSVGPathSegAtLengthFromSVGPathByteStream): Deleted.
>+        (WebCore::getTotalLengthOfSVGPathByteStream): Deleted.
>+        (WebCore::getPointAtLengthOfSVGPathByteStream): Deleted.
>+        * svg/SVGPathUtilities.h:
>+        * svg/SVGPatternElement.h:
>+        * svg/SVGPolyElement.h:
>+        * svg/SVGRadialGradientElement.h:
>+        * svg/SVGRectElement.h:
>+        * svg/SVGSVGElement.h:
>+        * svg/SVGScriptElement.h:
>+        * svg/SVGStopElement.h:
>+        * svg/SVGStyleElement.h:
>+        * svg/SVGSwitchElement.h:
>+        * svg/SVGSymbolElement.h:
>+        * svg/SVGTRefElement.h:
>+        * svg/SVGTSpanElement.h:
>+        * svg/SVGTextContentElement.h:
>+        * svg/SVGTextElement.h:
>+        * svg/SVGTextPathElement.h:
>+        * svg/SVGTextPositioningElement.h:
>+        * svg/SVGTitleElement.h:
>+        * svg/SVGUnknownElement.h:
>+        * svg/SVGUseElement.h:
>+        * svg/SVGVKernElement.h:
>+        * svg/SVGViewElement.h:
>+
>+2019-06-08  Said Abou-Hallawa  <said@apple.com>
>+
>+        SVGPropertyTraits and SVG enum types clean up
>+        https://bugs.webkit.org/show_bug.cgi?id=198073
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        In this patch:
>+
>+        -- All SVGPropertyTraits will have two functions for parsing a string to 
>+           the property type. 
>+           1) parse() will return Expected<PropertyType, SVGParsingError>.
>+           2) fromString() will call parse() but will return the default value
>+              if parse() returns an error.
>+
>+        -- All the SVG enum types are moved to a single file named SVGEnumType.h.
>+           A new SVGPropertyTraits is defined for all enum types including the
>+           non-SVG enum types, e.g. BlendMode.
>+
>+        -- All SVGPropertyTraits for the enum types are removed. Parsing a string
>+           to an enum value will be done by SVGEnumValueParser::parse(). Getting 
>+           a string from an enum value is done by SVGEnumValueComposer::toString().
>+           Each enum type needs to template specialize SVGEnumTraits::values()
>+           which associates every emum value with a string.
>+
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * css/CSSPrimitiveValueMappings.h:
>+        (WebCore::CSSPrimitiveValue::CSSPrimitiveValue):
>+        * platform/graphics/GraphicsTypes.h:
>+        * platform/graphics/cg/GraphicsContextCG.cpp:
>+        (WebCore::selectCGBlendMode):
>+        * svg/SVGAngleValue.h:
>+        (WebCore::SVGPropertyTraits<SVGAngleValue>::initialValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGAngleValue>::toString): Deleted.
>+        * svg/SVGComponentTransferFunctionElement.h:
>+        (WebCore::SVGPropertyTraits<ComponentTransferType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<ComponentTransferType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<ComponentTransferType>::fromString): Deleted.
>+        * svg/SVGFEBlendElement.h:
>+        (WebCore::SVGPropertyTraits<BlendMode>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<BlendMode>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<BlendMode>::toString): Deleted.
>+        * svg/SVGFEColorMatrixElement.h:
>+        (WebCore::SVGPropertyTraits<ColorMatrixType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<ColorMatrixType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<ColorMatrixType>::fromString): Deleted.
>+        * svg/SVGFECompositeElement.h:
>+        (WebCore::SVGIDLEnumLimits<CompositeOperationType>::highestExposedEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<CompositeOperationType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<CompositeOperationType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<CompositeOperationType>::fromString): Deleted.
>+        * svg/SVGFEConvolveMatrixElement.h:
>+        (WebCore::SVGPropertyTraits<EdgeModeType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<EdgeModeType>::initialValue): Deleted.
>+        (WebCore::SVGPropertyTraits<EdgeModeType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<EdgeModeType>::fromString): Deleted.
>+        * svg/SVGFEDisplacementMapElement.h:
>+        (WebCore::SVGPropertyTraits<ChannelSelectorType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<ChannelSelectorType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<ChannelSelectorType>::fromString): Deleted.
>+        * svg/SVGFEMorphologyElement.h:
>+        (WebCore::SVGPropertyTraits<MorphologyOperatorType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<MorphologyOperatorType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<MorphologyOperatorType>::fromString): Deleted.
>+        * svg/SVGFETurbulenceElement.cpp:
>+        (WebCore::SVGFETurbulenceElement::build):
>+        * svg/SVGFETurbulenceElement.h:
>+        (WebCore::SVGPropertyTraits<SVGStitchOptions>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGStitchOptions>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGStitchOptions>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<TurbulenceType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<TurbulenceType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<TurbulenceType>::fromString): Deleted.
>+        * svg/SVGGradientElement.h:
>+        (WebCore::SVGPropertyTraits<SVGSpreadMethodType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGSpreadMethodType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGSpreadMethodType>::fromString): Deleted.
>+        * svg/SVGLengthValue.h:
>+        (WebCore::SVGPropertyTraits<SVGLengthValue>::initialValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGLengthValue>::parse): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGLengthValue>::toString): Deleted.
>+        * svg/SVGMarkerTypes.h:
>+        (WebCore::SVGPropertyTraits<SVGMarkerUnitsType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerUnitsType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerUnitsType>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerOrientType>::autoString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerOrientType>::autoStartReverseString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerOrientType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerOrientType>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGMarkerOrientType>::toString): Deleted.
>+        (WebCore::SVGIDLEnumLimits<SVGMarkerOrientType>::highestExposedEnumValue): Deleted.
>+        * svg/SVGParsingError.h:
>+        (WebCore::SVGNumericParsingValidator::validate):
>+        (WebCore::validateNumeric):
>+        * svg/SVGPreserveAspectRatioValue.h:
>+        (WebCore::SVGPropertyTraits<SVGPreserveAspectRatioValue>::initialValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGPreserveAspectRatioValue>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGPreserveAspectRatioValue>::parse): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGPreserveAspectRatioValue>::toString): Deleted.
>+        * svg/SVGTextContentElement.h:
>+        (WebCore::SVGPropertyTraits<SVGLengthAdjustType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGLengthAdjustType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGLengthAdjustType>::fromString): Deleted.
>+        * svg/SVGTextPathElement.h:
>+        (WebCore::SVGPropertyTraits<SVGTextPathMethodType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGTextPathMethodType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGTextPathMethodType>::fromString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGTextPathSpacingType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGTextPathSpacingType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGTextPathSpacingType>::fromString): Deleted.
>+        * svg/SVGUnitTypes.h:
>+        (WebCore::SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::highestEnumValue): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::toString): Deleted.
>+        (WebCore::SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString): Deleted.
>+        * svg/SVGZoomAndPan.h:
>+        (WebCore::SVGZoomAndPan::reset):
>+        * svg/SVGZoomAndPanType.h: Deleted.
>+        * svg/properties/SVGDecoratedPrimitive.h:
>+        * svg/properties/SVGEnumTraits.h: Added.
>+        (WebCore::SVGEnumValueChecker::isValidEnum):
>+        (WebCore::SVGEnumValueParser::parse):
>+        (WebCore::SVGEnumValueComposer::toString):
>+        * svg/properties/SVGEnumType.h: Added.
>+        * svg/properties/SVGEnumTypeTraits.h: Added.
>+        (WebCore::SVGEnumTraits<BlendMode>::values):
>+        (WebCore::SVGEnumTraits<BlendMode>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<ChannelSelectorType>::values):
>+        (WebCore::SVGEnumTraits<ChannelSelectorType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<ComponentTransferType>::values):
>+        (WebCore::SVGEnumTraits<ComponentTransferType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<ColorMatrixType>::values):
>+        (WebCore::SVGEnumTraits<ColorMatrixType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<CompositeOperationType>::values):
>+        (WebCore::SVGEnumTraits<CompositeOperationType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<EdgeModeType>::values):
>+        (WebCore::SVGEnumTraits<EdgeModeType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<MorphologyOperatorType>::values):
>+        (WebCore::SVGEnumTraits<MorphologyOperatorType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<TurbulenceType>::values):
>+        (WebCore::SVGEnumTraits<TurbulenceType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGLengthAdjustType>::values):
>+        (WebCore::SVGEnumTraits<SVGLengthAdjustType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGMarkerUnitsType>::values):
>+        (WebCore::SVGEnumTraits<SVGMarkerUnitsType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGMarkerOrientType>::values):
>+        (WebCore::SVGEnumTraits<SVGMarkerOrientType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGSpreadMethodType>::values):
>+        (WebCore::SVGEnumTraits<SVGSpreadMethodType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGStitchOptions>::values):
>+        (WebCore::SVGEnumTraits<SVGStitchOptions>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGTextPathMethodType>::values):
>+        (WebCore::SVGEnumTraits<SVGTextPathMethodType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGTextPathSpacingType>::values):
>+        (WebCore::SVGEnumTraits<SVGTextPathSpacingType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGUnitTypes::SVGUnitType>::values):
>+        (WebCore::SVGEnumTraits<SVGUnitTypes::SVGUnitType>::highestExposedEnumValue):
>+        (WebCore::SVGEnumTraits<SVGZoomAndPanType>::values):
>+        (WebCore::SVGEnumTraits<SVGZoomAndPanType>::highestExposedEnumValue):
>+        * svg/properties/SVGPropertyTraits.h:
>+        (WebCore::SVGPropertyTraits<bool>::parse):
>+        (WebCore::SVGPropertyTraits<bool>::fromString):
>+        (WebCore::SVGPropertyTraits<bool>::toString):
>+        (WebCore::SVGPropertyTraits<Color>::parse):
>+        (WebCore::SVGPropertyTraits<Color>::fromString):
>+        (WebCore::SVGPropertyTraits<Color>::toString):
>+        (WebCore::SVGPropertyTraits<String>::initialValue):
>+        (WebCore::SVGPropertyTraits<String>::parse):
>+        (WebCore::SVGPropertyTraits<String>::fromString):
>+        (WebCore::SVGPropertyTraits<String>::toString):
>+        (WebCore::SVGPropertyTraits<float>::parse):
>+        (WebCore::SVGPropertyTraits<float>::fromString):
>+        (WebCore::SVGPropertyTraits<float>::toString):
>+        (WebCore::SVGPropertyTraits<int>::initialValue):
>+        (WebCore::SVGPropertyTraits<int>::parse):
>+        (WebCore::SVGPropertyTraits<int>::fromString):
>+        (WebCore::SVGPropertyTraits<int>::toString):
>+        (WebCore::SVGPropertyTraits<FloatPoint>::parse):
>+        (WebCore::SVGPropertyTraits<FloatPoint>::fromString):
>+        (WebCore::SVGPropertyTraits<FloatPoint>::toString):
>+        (WebCore::SVGPropertyTraits<FloatRect>::parse):
>+        (WebCore::SVGPropertyTraits<FloatRect>::fromString):
>+        (WebCore::SVGPropertyTraits<FloatRect>::toString):
>+        (WebCore::SVGPropertyTraits<unsigned>::initialValue): Deleted.
>+        (WebCore::SVGPropertyTraits<unsigned>::parse): Deleted.
>+        (WebCore::SVGPropertyTraits<unsigned>::toString): Deleted.
>+        (WebCore::SVGIDLEnumLimits::highestExposedEnumValue): Deleted.
>+
>+2019-05-20  Said Abou-Hallawa  <said@apple.com>
>+
>+        Unify the parsing of SVGList super classes
>+        https://bugs.webkit.org/show_bug.cgi?id=197831
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Parsing the SVG lists is just ad-hoc. There is no single rule for:
>+
>+        -- The leading spaces: SVGLengthList SVGNumberList treated them as an error
>+           while SVGTransformList and SVGPointList were just skipping them.
>+        -- Status of the list in case of an error: SVGTransformList was clearing
>+           the list if an error was detected. The other lists were leaving whatever
>+           is parsed before the error happened but return an error.
>+        -- Reporting an error message in the console: SVGPointList was reporting
>+           an error message if a parsing error happened. The other type of lists
>+           were just silent when an error happens.
>+        -- Delimiters: SVGNumberList assume the white spaces are the only allowed
>+           delimiter. All other lists allow the comma also as a delimiter.
>+        -- Extra text at the end: SVGTransformList was not reporting an error if
>+           there is extra text at the end. Other list were returning false.
>+
>+        In addition to that, the parsing code was repeated in every SVGList
>+        super class. Instead parsing the list should be in SVGValuePropertyList
>+        and SVGPrimitiveList. And parsing the item should be moved to the value
>+        property class or the SVGPropertyTraits of the primitive.
>+
>+        SVGViewSpec parsing is cleaned up in the patch as well. Parsing of this
>+        class is needed to create the view for a fragment.
>+
>+        * svg/SVGElement.cpp:
>+        (WebCore::SVGElement::reportAttributeParsingError):
>+        * svg/SVGFitToViewBox.cpp:
>+        (WebCore::SVGFitToViewBox::parseAttribute):
>+        (WebCore::SVGFitToViewBox::parseViewBox):
>+        * svg/SVGFitToViewBox.h:
>+        * svg/SVGLength.h:
>+        (WebCore::SVGLength::create):
>+        * svg/SVGLengthList.h:
>+        (WebCore::SVGLengthList::parse):
>+        * svg/SVGNumber.h:
>+        (WebCore::SVGNumber::create):
>+        * svg/SVGNumberList.h:
>+        (WebCore::SVGNumberList::create):
>+        (WebCore::SVGNumberList::parse): Deleted.
>+        (): Deleted.
>+        * svg/SVGParsingError.h:
>+        * svg/SVGPoint.h:
>+        (WebCore::SVGPoint::create):
>+        * svg/SVGPointList.h:
>+        (WebCore::SVGPointList::create):
>+        (WebCore::SVGPointList::parse): Deleted.
>+        (): Deleted.
>+        * svg/SVGPolyElement.cpp:
>+        (WebCore::SVGPolyElement::parseAttribute):
>+        * svg/SVGPreserveAspectRatioValue.cpp:
>+        (WebCore::SVGPreserveAspectRatioValue::parse):
>+        * svg/SVGPreserveAspectRatioValue.h:
>+        * svg/SVGSVGElement.cpp:
>+        (WebCore::SVGSVGElement::parseAttribute):
>+        (WebCore::SVGSVGElement::scrollToFragment):
>+        * svg/SVGStringList.h:
>+        * svg/SVGTests.cpp:
>+        (WebCore::SVGTests::parseAttribute):
>+        * svg/SVGTransform.h:
>+        (WebCore::SVGTransform::create):
>+        * svg/SVGTransformList.h:
>+        * svg/SVGViewElement.cpp:
>+        (WebCore::SVGViewElement::parseAttribute):
>+        * svg/SVGViewSpec.cpp:
>+        (WebCore::parseNamesValues):
>+        (WebCore::SVGViewSpec::parseAttribute):
>+        (WebCore::SVGViewSpec::parseViewSpec):
>+        * svg/SVGViewSpec.h:
>+        * svg/SVGZoomAndPan.cpp:
>+        (WebCore::SVGZoomAndPan::parseAttribute):
>+        (WebCore::SVGZoomAndPan::parseZoomAndPan): Deleted.
>+        * svg/SVGZoomAndPan.h:
>+        * svg/SVGZoomAndPanType.h:
>+        (WebCore::SVGPropertyTraits<SVGZoomAndPanType>::parse):
>+        (WebCore::SVGPropertyTraits<SVGZoomAndPanType>::fromString):
>+        (WebCore::SVGPropertyTraits<SVGZoomAndPanType>::toString): Deleted.
>+        * svg/properties/SVGPrimitiveList.h:
>+        (WebCore::SVGPrimitiveList::parse):
>+        * svg/properties/SVGValuePropertyList.h:
>+        (WebCore::SVGValuePropertyList::parse):
>+
> 2019-06-08  Zalan Bujtas  <zalan@apple.com>
> 
>         [LFC][IFC] Introduce Baseline to LineBox
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 7b69a86dc7928a7fc65c178f507aebbd862b11a7..e734eed95d0e24a3f83b42976892bcbd31438070 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -1743,7 +1743,6 @@
> 		55DCC52822407B2000C26E32 /* SVGPrimitiveList.h in Headers */ = {isa = PBXBuildFile; fileRef = 55DCC5252240749E00C26E32 /* SVGPrimitiveList.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		55DCC52922407B2A00C26E32 /* SVGList.h in Headers */ = {isa = PBXBuildFile; fileRef = 55DCC523224073FE00C26E32 /* SVGList.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		55EC9599206AA7A0007DD0A9 /* PaintFrequencyTracker.h in Headers */ = {isa = PBXBuildFile; fileRef = 55EC95972069C92D007DD0A9 /* PaintFrequencyTracker.h */; settings = {ATTRIBUTES = (Private, ); }; };
>-		55FA7FFB2110ECD7005AEFE7 /* SVGZoomAndPanType.h in Headers */ = {isa = PBXBuildFile; fileRef = 55FA7FFA2110ECD7005AEFE7 /* SVGZoomAndPanType.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		5704405A1E53936200356601 /* JSAesCbcCfbParams.h in Headers */ = {isa = PBXBuildFile; fileRef = 570440591E53936200356601 /* JSAesCbcCfbParams.h */; };
> 		5706A6961DDE5C9500A03B14 /* CryptoAlgorithmRsaOaepParams.h in Headers */ = {isa = PBXBuildFile; fileRef = 5706A6951DDE5C9500A03B14 /* CryptoAlgorithmRsaOaepParams.h */; };
> 		5706A6981DDE5E4600A03B14 /* JSRsaOaepParams.h in Headers */ = {isa = PBXBuildFile; fileRef = 5706A6971DDE5E4600A03B14 /* JSRsaOaepParams.h */; };
>@@ -8562,7 +8561,6 @@
> 		55EE5362223B2A2300FBA944 /* SVGAnimatedProperty.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SVGAnimatedProperty.h; sourceTree = "<group>"; };
> 		55EE5363223B2A2400FBA944 /* SVGProperty.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SVGProperty.h; sourceTree = "<group>"; };
> 		55EE5364223B2A2400FBA944 /* SVGAttributeAnimator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SVGAttributeAnimator.h; sourceTree = "<group>"; };
>-		55FA7FFA2110ECD7005AEFE7 /* SVGZoomAndPanType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGZoomAndPanType.h; sourceTree = "<group>"; };
> 		570440571E53851600356601 /* CryptoAlgorithmAES_CFBMac.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CryptoAlgorithmAES_CFBMac.cpp; sourceTree = "<group>"; };
> 		570440591E53936200356601 /* JSAesCbcCfbParams.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSAesCbcCfbParams.h; sourceTree = "<group>"; };
> 		5704405B1E53937900356601 /* JSAesCbcCfbParams.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSAesCbcCfbParams.cpp; sourceTree = "<group>"; };
>@@ -9406,6 +9404,9 @@
> 		724ED3301A3A8B2300F5F13C /* JSEXTBlendMinMax.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSEXTBlendMinMax.h; sourceTree = "<group>"; };
> 		724EE54E1DC7F25B00A91FFB /* ActivityState.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ActivityState.h; sourceTree = "<group>"; };
> 		724EE54F1DC7F25B00A91FFB /* ActivityStateChangeObserver.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ActivityStateChangeObserver.h; sourceTree = "<group>"; };
>+		72654AA3228C6B3B00BEB103 /* SVGEnumTraits.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGEnumTraits.h; sourceTree = "<group>"; };
>+		72654AA7228EFDC400BEB103 /* SVGEnumType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGEnumType.h; sourceTree = "<group>"; };
>+		72654AA8228F383600BEB103 /* SVGEnumTypeTraits.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGEnumTypeTraits.h; sourceTree = "<group>"; };
> 		7266F0132241BCE200833975 /* SVGPropertyAnimatorFactory.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGPropertyAnimatorFactory.h; sourceTree = "<group>"; };
> 		7266F0142241BFB200833975 /* SVGPrimitivePropertyAnimatorImpl.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGPrimitivePropertyAnimatorImpl.h; sourceTree = "<group>"; };
> 		7266F0152241C09800833975 /* SVGPrimitivePropertyAnimator.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SVGPrimitivePropertyAnimator.h; sourceTree = "<group>"; };
>@@ -16069,6 +16070,9 @@
> 				5553592122441B97008F5EC9 /* SVGDecoratedEnumeration.h */,
> 				5553592222441BE9008F5EC9 /* SVGDecoratedPrimitive.h */,
> 				5553592322441C18008F5EC9 /* SVGDecoratedProperty.h */,
>+				72654AA3228C6B3B00BEB103 /* SVGEnumTraits.h */,
>+				72654AA7228EFDC400BEB103 /* SVGEnumType.h */,
>+				72654AA8228F383600BEB103 /* SVGEnumTypeTraits.h */,
> 				55DCC523224073FE00C26E32 /* SVGList.h */,
> 				55EE5354223B29E900FBA944 /* SVGMemberAccessor.h */,
> 				55BE025A223B29C20032F08A /* SVGPointerMemberAccessor.h */,
>@@ -24236,7 +24240,6 @@
> 				B222795F0D00BF210071B782 /* SVGZoomAndPan.cpp */,
> 				B22279600D00BF210071B782 /* SVGZoomAndPan.h */,
> 				B22279610D00BF210071B782 /* SVGZoomAndPan.idl */,
>-				55FA7FFA2110ECD7005AEFE7 /* SVGZoomAndPanType.h */,
> 				B2E4EC940D00C22B00432643 /* SVGZoomEvent.cpp */,
> 				B2E4EC950D00C22B00432643 /* SVGZoomEvent.h */,
> 				B2E4EC960D00C22B00432643 /* SVGZoomEvent.idl */,
>@@ -31786,7 +31789,6 @@
> 				B2227AF30D00BF220071B782 /* SVGViewSpec.h in Headers */,
> 				8485228B1190173C006EDC7F /* SVGVKernElement.h in Headers */,
> 				B2227AF60D00BF220071B782 /* SVGZoomAndPan.h in Headers */,
>-				55FA7FFB2110ECD7005AEFE7 /* SVGZoomAndPanType.h in Headers */,
> 				B2E4EC980D00C22B00432643 /* SVGZoomEvent.h in Headers */,
> 				46ECB6381FD0A3C80088E5AD /* SWClientConnection.h in Headers */,
> 				46658DC91FA24B8700F7DD54 /* SWContextManager.h in Headers */,
>diff --git a/Source/WebCore/css/CSSPrimitiveValueMappings.h b/Source/WebCore/css/CSSPrimitiveValueMappings.h
>index 9d120ca5e823c5a2c2092259d0a80da093b6d353..8ff4ff03e7ce624e5c12c24f4902da1ad0cf9da4 100644
>--- a/Source/WebCore/css/CSSPrimitiveValueMappings.h
>+++ b/Source/WebCore/css/CSSPrimitiveValueMappings.h
>@@ -3923,6 +3923,9 @@ template<> inline CSSPrimitiveValue::CSSPrimitiveValue(BlendMode blendMode)
> {
>     m_primitiveUnitType = CSS_VALUE_ID;
>     switch (blendMode) {
>+    case BlendMode::Unknown:
>+        ASSERT_NOT_REACHED();
>+        break;
>     case BlendMode::Normal:
>         m_value.valueID = CSSValueNormal;
>         break;
>diff --git a/Source/WebCore/platform/graphics/GraphicsTypes.h b/Source/WebCore/platform/graphics/GraphicsTypes.h
>index 6e1afee198ca438ed25e4715f79d652a7fb1d220..e94223cef646056b3ef6e099018d27ab89505dce 100644
>--- a/Source/WebCore/platform/graphics/GraphicsTypes.h
>+++ b/Source/WebCore/platform/graphics/GraphicsTypes.h
>@@ -52,6 +52,7 @@ enum CompositeOperator {
> };
> 
> enum class BlendMode {
>+    Unknown = 0,
>     Normal = 1, // Start with 1 to match SVG's blendmode enumeration.
>     Multiply,
>     Screen,
>diff --git a/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp b/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
>index 8adf8014df59621fa049a84772ad4b8425f67881..c726f9dba2e45266d7cee2523e9d8e5047bcb8cd 100644
>--- a/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
>+++ b/Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
>@@ -154,6 +154,9 @@ static InterpolationQuality convertInterpolationQuality(CGInterpolationQuality q
> static CGBlendMode selectCGBlendMode(CompositeOperator compositeOperator, BlendMode blendMode)
> {
>     switch (blendMode) {
>+    case BlendMode::Unknown:
>+        ASSERT_NOT_REACHED();
>+        return kCGBlendModeNormal;
>     case BlendMode::Normal:
>         switch (compositeOperator) {
>         case CompositeClear:
>diff --git a/Source/WebCore/svg/SVGAElement.h b/Source/WebCore/svg/SVGAElement.h
>index 7e1d2946704e6755be34e40e798474fb14c701c6..6d1ef45ec17b52df32a38481e0e1e542f2d11012 100644
>--- a/Source/WebCore/svg/SVGAElement.h
>+++ b/Source/WebCore/svg/SVGAElement.h
>@@ -31,6 +31,8 @@ namespace WebCore {
> 
> class SVGAElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGAElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGAElement> create(const QualifiedName&, Document&);
> 
>@@ -42,9 +44,7 @@ public:
> private:
>     SVGAElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>@@ -66,8 +66,6 @@ private:
> 
>     PropertyRegistry m_propertyRegistry { *this };
>     Ref<SVGAnimatedString> m_target { SVGAnimatedString::create(this) };
>-
>-    // This is computed only once and must not be affected by subsequent URL changes.
>     mutable Optional<SharedStringHash> m_storedVisitedLinkHash;
> };
> 
>diff --git a/Source/WebCore/svg/SVGAltGlyphDefElement.h b/Source/WebCore/svg/SVGAltGlyphDefElement.h
>index 47174fbb02b6d7b22a4bd467be57ab55f9523928..e3d579267b112092f2520ba7f1b72524e34d3d7f 100644
>--- a/Source/WebCore/svg/SVGAltGlyphDefElement.h
>+++ b/Source/WebCore/svg/SVGAltGlyphDefElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGAltGlyphDefElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGAltGlyphDefElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAltGlyphDefElement, SVGElement>;
>+
> public:
>     static Ref<SVGAltGlyphDefElement> create(const QualifiedName&, Document&);
> 
>@@ -36,7 +38,10 @@ public:
> private:
>     SVGAltGlyphDefElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+    
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGAltGlyphElement.h b/Source/WebCore/svg/SVGAltGlyphElement.h
>index 5d902f6756c39c7a2cfe7830fc448251907e07e0..9459da4681c36b068b05ecaee46bba3735981a4a 100644
>--- a/Source/WebCore/svg/SVGAltGlyphElement.h
>+++ b/Source/WebCore/svg/SVGAltGlyphElement.h
>@@ -32,6 +32,8 @@ class SVGGlyphElement;
> 
> class SVGAltGlyphElement final : public SVGTextPositioningElement, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGAltGlyphElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAltGlyphElement, SVGTextPositioningElement, SVGURIReference>;
>+
> public:
>     static Ref<SVGAltGlyphElement> create(const QualifiedName&, Document&);
> 
>@@ -45,11 +47,9 @@ public:
> private:
>     SVGAltGlyphElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAltGlyphElement, SVGTextPositioningElement, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>-    RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>-    bool childShouldCreateRenderer(const Node&) const override;
>+    RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>+    bool childShouldCreateRenderer(const Node&) const final;
> 
>     PropertyRegistry m_propertyRegistry { *this };
> };
>diff --git a/Source/WebCore/svg/SVGAltGlyphItemElement.h b/Source/WebCore/svg/SVGAltGlyphItemElement.h
>index 606b7833484763f6c13529059f487596f6dff833..65fc04eec7d62f0455e7c4fcd12aebed7f82cef6 100644
>--- a/Source/WebCore/svg/SVGAltGlyphItemElement.h
>+++ b/Source/WebCore/svg/SVGAltGlyphItemElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGAltGlyphItemElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGAltGlyphItemElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAltGlyphItemElement, SVGElement>;
>+
> public:
>     static Ref<SVGAltGlyphItemElement> create(const QualifiedName&, Document&);
> 
>@@ -36,7 +38,10 @@ public:
> private:
>     SVGAltGlyphItemElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+    
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGAngleValue.h b/Source/WebCore/svg/SVGAngleValue.h
>index 4d402f7fcd45a1fc7e7947d961de9ea5914be461..cc4544183cf0df90fb7eb92a93aa3df1eb31528b 100644
>--- a/Source/WebCore/svg/SVGAngleValue.h
>+++ b/Source/WebCore/svg/SVGAngleValue.h
>@@ -56,10 +56,4 @@ private:
>     float m_valueInSpecifiedUnits { 0 };
> };
> 
>-template<>
>-struct SVGPropertyTraits<SVGAngleValue> {
>-    static SVGAngleValue initialValue() { return SVGAngleValue(); }
>-    static String toString(const SVGAngleValue& type) { return type.valueAsString(); }
>-};
>-
> }
>diff --git a/Source/WebCore/svg/SVGAnimationElement.h b/Source/WebCore/svg/SVGAnimationElement.h
>index 54e9128129c792cf811e3d605756390f080afe35..620d91996ae8dc1057ce4720dabfd40d419944d8 100644
>--- a/Source/WebCore/svg/SVGAnimationElement.h
>+++ b/Source/WebCore/svg/SVGAnimationElement.h
>@@ -40,6 +40,8 @@ enum AnimatedPropertyValueType { RegularPropertyValue, CurrentColorValue, Inheri
> 
> class SVGAnimationElement : public SVGSMILElement, public SVGExternalResourcesRequired, public SVGTests {
>     WTF_MAKE_ISO_ALLOCATED(SVGAnimationElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAnimationElement, SVGElement, SVGExternalResourcesRequired, SVGTests>;
>+
> public:
>     float getStartTime() const;
>     float getCurrentTime() const;
>@@ -86,9 +88,6 @@ public:
> protected:
>     SVGAnimationElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAnimationElement, SVGElement, SVGExternalResourcesRequired, SVGTests>;
>-    const SVGPropertyRegistry& propertyRegistry() const override { return m_propertyRegistry; }
>-
>     virtual void resetAnimation();
> 
>     static bool isSupportedAttribute(const QualifiedName&);
>@@ -115,6 +114,7 @@ protected:
>     void setCalcMode(CalcMode calcMode) { m_calcMode = calcMode; }
> 
> private:
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void animationAttributeChanged() override;
>     void setAttributeType(const AtomicString&);
> 
>diff --git a/Source/WebCore/svg/SVGCircleElement.h b/Source/WebCore/svg/SVGCircleElement.h
>index 5f90c70fa9d6bb02edb75470619c4f93248bf00c..f82726092fe5a4315dc841e7daced6c8cc41521f 100644
>--- a/Source/WebCore/svg/SVGCircleElement.h
>+++ b/Source/WebCore/svg/SVGCircleElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGCircleElement final : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGCircleElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCircleElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGCircleElement> create(const QualifiedName&, Document&);
> 
>@@ -43,9 +45,7 @@ public:
> private:
>     SVGCircleElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCircleElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGClipPathElement.h b/Source/WebCore/svg/SVGClipPathElement.h
>index 3ef0368cc94f44adf4d04f7a3ac28dd3cbbbe396..8890a30248f7fdf1be39e1184d4ba691eb26bbee 100644
>--- a/Source/WebCore/svg/SVGClipPathElement.h
>+++ b/Source/WebCore/svg/SVGClipPathElement.h
>@@ -31,6 +31,8 @@ class RenderObject;
> 
> class SVGClipPathElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGClipPathElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGClipPathElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGClipPathElement> create(const QualifiedName&, Document&);
> 
>@@ -40,9 +42,7 @@ public:
> private:
>     SVGClipPathElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGClipPathElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
>     void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/svg/SVGComponentTransferFunctionElement.h b/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>index a3388f82e28219446f2f231e6b0e753abfdf5131..560c52da41c2df42f78548fd716662b211d316fb 100644
>--- a/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>+++ b/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>@@ -26,49 +26,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-struct SVGPropertyTraits<ComponentTransferType> {
>-    static unsigned highestEnumValue() { return FECOMPONENTTRANSFER_TYPE_GAMMA; }
>-
>-    static String toString(ComponentTransferType type)
>-    {
>-        switch (type) {
>-        case FECOMPONENTTRANSFER_TYPE_UNKNOWN:
>-            return emptyString();
>-        case FECOMPONENTTRANSFER_TYPE_IDENTITY:
>-            return "identity"_s;
>-        case FECOMPONENTTRANSFER_TYPE_TABLE:
>-            return "table"_s;
>-        case FECOMPONENTTRANSFER_TYPE_DISCRETE:
>-            return "discrete"_s;
>-        case FECOMPONENTTRANSFER_TYPE_LINEAR:
>-            return "linear"_s;
>-        case FECOMPONENTTRANSFER_TYPE_GAMMA:
>-            return "gamma"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static ComponentTransferType fromString(const String& value)
>-    {
>-        if (value == "identity")
>-            return FECOMPONENTTRANSFER_TYPE_IDENTITY;
>-        if (value == "table")
>-            return FECOMPONENTTRANSFER_TYPE_TABLE;
>-        if (value == "discrete")
>-            return FECOMPONENTTRANSFER_TYPE_DISCRETE;
>-        if (value == "linear")
>-            return FECOMPONENTTRANSFER_TYPE_LINEAR;
>-        if (value == "gamma")
>-            return FECOMPONENTTRANSFER_TYPE_GAMMA;
>-        return FECOMPONENTTRANSFER_TYPE_UNKNOWN;
>-    }
>-};
>-
> class SVGComponentTransferFunctionElement : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGComponentTransferFunctionElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGComponentTransferFunctionElement, SVGElement>;
>+
> public:
>     ComponentTransferFunction transferFunction() const;
> 
>@@ -91,13 +52,11 @@ public:
> protected:
>     SVGComponentTransferFunctionElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGComponentTransferFunctionElement, SVGElement>;
>-    const SVGPropertyRegistry& propertyRegistry() const override { return m_propertyRegistry; }
>-
>-    void parseAttribute(const QualifiedName&, const AtomicString&) override;
>-    void svgAttributeChanged(const QualifiedName&) override;
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>+    void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+    void svgAttributeChanged(const QualifiedName&) final;
> 
>-    bool rendererIsNeeded(const RenderStyle&) override { return false; }
>+    bool rendererIsNeeded(const RenderStyle&) final { return false; }
>     
> private:
>     PropertyRegistry m_propertyRegistry { *this };
>diff --git a/Source/WebCore/svg/SVGCursorElement.h b/Source/WebCore/svg/SVGCursorElement.h
>index 9b812ebc8b4f11be972025aaa64458642fba6aed..6a123811d846e9ca18f89869cc60916253bd34a1 100644
>--- a/Source/WebCore/svg/SVGCursorElement.h
>+++ b/Source/WebCore/svg/SVGCursorElement.h
>@@ -32,6 +32,8 @@ class CSSCursorImageValue;
> 
> class SVGCursorElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGTests, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGCursorElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCursorElement, SVGElement, SVGExternalResourcesRequired, SVGTests, SVGURIReference>;
>+
> public:
>     static Ref<SVGCursorElement> create(const QualifiedName&, Document&);
> 
>@@ -49,9 +51,7 @@ public:
> private:
>     SVGCursorElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCursorElement, SVGElement, SVGExternalResourcesRequired, SVGTests, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-    
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGDefsElement.h b/Source/WebCore/svg/SVGDefsElement.h
>index 8fbbef843bd8a9db43647c4653e9d7d41e96db37..6a44c918eca7c9b282ded0144ac8f90aeebfb79f 100644
>--- a/Source/WebCore/svg/SVGDefsElement.h
>+++ b/Source/WebCore/svg/SVGDefsElement.h
>@@ -28,13 +28,14 @@ namespace WebCore {
> 
> class SVGDefsElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGDefsElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGDefsElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGDefsElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGDefsElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGDefsElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>     bool isValid() const final;
>diff --git a/Source/WebCore/svg/SVGDescElement.h b/Source/WebCore/svg/SVGDescElement.h
>index 5f5e1d8124ba903472704858ddc6b7a83774ab2f..32b2263ed1650dd87451c18e124dc87081e95311 100644
>--- a/Source/WebCore/svg/SVGDescElement.h
>+++ b/Source/WebCore/svg/SVGDescElement.h
>@@ -26,6 +26,8 @@ namespace WebCore {
> 
> class SVGDescElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGDescElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGDescElement, SVGElement>;
>+
> public:
>     static Ref<SVGDescElement> create(const QualifiedName&, Document&);
> 
>@@ -34,7 +36,10 @@ public:
> private:
>     SVGDescElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGElement.cpp b/Source/WebCore/svg/SVGElement.cpp
>index cc5b6fd25e85b7f9ca9eca2e1aead4ef458f6189..e03decc2e558b87bb5f340627027ef6561ac5862 100644
>--- a/Source/WebCore/svg/SVGElement.cpp
>+++ b/Source/WebCore/svg/SVGElement.cpp
>@@ -238,17 +238,31 @@ void SVGElement::reportAttributeParsingError(SVGParsingError error, const Qualif
>     String errorString = "<" + tagName() + "> attribute " + name.toString() + "=\"" + value + "\"";
>     SVGDocumentExtensions& extensions = document().accessSVGExtensions();
> 
>-    if (error == NegativeValueForbiddenError) {
>+    switch (error) {
>+    case NoError:
>+        ASSERT_NOT_REACHED();
>+        break;
>+
>+    case UnexpectedEndOfAttributeError:
>+        extensions.reportError("Unexpected end of attribute for " + errorString);
>+        break;
>+
>+    case ZeroValueForbiddenError:
>+        extensions.reportError("Invalid zero value for " + errorString);
>+        break;
>+
>+    case NegativeValueForbiddenError:
>         extensions.reportError("Invalid negative value for " + errorString);
>-        return;
>-    }
>+        break;
>+
>+    case UnrecognizedEnumValueError:
>+        extensions.reportError("Unrecognized enumerated value for " + errorString);
>+        break;
> 
>-    if (error == ParsingAttributeFailedError) {
>+    case ParsingAttributeFailedError:
>         extensions.reportError("Invalid value for " + errorString);
>-        return;
>+        break;
>     }
>-
>-    ASSERT_NOT_REACHED();
> }
> 
> void SVGElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
>@@ -574,7 +588,7 @@ void SVGElement::commitPropertyChange(SVGProperty* property)
>     // We want to dirty the top-level property when a descendant changes. For example
>     // a change in an SVGLength item in SVGLengthList should set the dirty flag on
>     // SVGLengthList and not the SVGLength.
>-    property->setDirty();
>+    property->setState(SVGPropertyState::Dirty);
> 
>     invalidateSVGAttributes();
>     svgAttributeChanged(propertyRegistry().propertyAttributeName(*property));
>@@ -588,7 +602,7 @@ void SVGElement::commitPropertyChange(SVGAnimatedProperty& animatedProperty)
>     // A change in a style property, e.g SVGRectElement::x should be serialized to
>     // the attribute immediately. Otherwise it is okay to be lazy in this regard.
>     if (!propertyRegistry().isAnimatedStylePropertyAttribute(attributeName))
>-        animatedProperty.setDirty();
>+        animatedProperty.setState(SVGPropertyState::Dirty);
>     else
>         setSynchronizedLazyAttribute(attributeName, animatedProperty.baseValAsString());
> 
>diff --git a/Source/WebCore/svg/SVGElement.h b/Source/WebCore/svg/SVGElement.h
>index b4a701d1ed82a944906fec755897b625f8bf7170..bd04b93bd955974e50c1771216bbb73124248b5d 100644
>--- a/Source/WebCore/svg/SVGElement.h
>+++ b/Source/WebCore/svg/SVGElement.h
>@@ -49,7 +49,10 @@ void mapAttributeToCSSProperty(HashMap<AtomicStringImpl*, CSSPropertyID>* proper
> 
> class SVGElement : public StyledElement, public SVGLangSpace, public SVGPropertyOwner {
>     WTF_MAKE_ISO_ALLOCATED(SVGElement);
>+
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGElement>;
>+
>     bool isOutermostSVGSVGElement() const;
> 
>     SVGSVGElement* ownerSVGElement() const;
>@@ -126,8 +129,7 @@ public:
>     class InstanceUpdateBlocker;
>     class InstanceInvalidationGuard;
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGElement>;
>-    virtual const SVGPropertyRegistry& propertyRegistry() const { return m_propertyRegistry; }
>+    virtual const SVGPropertyRegistry& propertyRegistry() const = 0;
>     void detachAllProperties() { propertyRegistry().detachAllProperties(); }
> 
>     bool isAnimatedPropertyAttribute(const QualifiedName&) const;
>@@ -200,7 +202,6 @@ private:
> 
>     std::unique_ptr<SVGPropertyAnimatorFactory> m_propertyAnimatorFactory;
> 
>-    PropertyRegistry m_propertyRegistry { *this };
>     Ref<SVGAnimatedString> m_className { SVGAnimatedString::create(this) };
> };
> 
>diff --git a/Source/WebCore/svg/SVGEllipseElement.h b/Source/WebCore/svg/SVGEllipseElement.h
>index 0fdca3767c4bb23fc62246777dc83a89117e9886..e3b1ea187eee28b5e9a1fd8f78d1630b4eed8f1c 100644
>--- a/Source/WebCore/svg/SVGEllipseElement.h
>+++ b/Source/WebCore/svg/SVGEllipseElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGEllipseElement final : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGEllipseElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGEllipseElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGEllipseElement> create(const QualifiedName&, Document&);
> 
>@@ -45,9 +47,7 @@ public:
> private:
>     SVGEllipseElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGEllipseElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGExternalResourcesRequired.h b/Source/WebCore/svg/SVGExternalResourcesRequired.h
>index 9919af6d1fa07c5dc559bc708810faf444eaea30..41ebe9c9973b20d050bdf40d4ccbffd89aa69adc 100644
>--- a/Source/WebCore/svg/SVGExternalResourcesRequired.h
>+++ b/Source/WebCore/svg/SVGExternalResourcesRequired.h
>@@ -36,7 +36,10 @@ class SVGElement;
> // FIXME: When implementing animVal support, make sure that animVal==baseVal for externalResourcesRequired
> class SVGExternalResourcesRequired {
>     WTF_MAKE_NONCOPYABLE(SVGExternalResourcesRequired);
>+
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGExternalResourcesRequired>;
>+
>     virtual ~SVGExternalResourcesRequired() = default;
> 
>     void parseAttribute(const QualifiedName&, const AtomicString&);
>@@ -44,8 +47,6 @@ public:
> 
>     static void addSupportedAttributes(HashSet<QualifiedName>&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGExternalResourcesRequired>;
>-
>     bool externalResourcesRequired() const { return m_externalResourcesRequired->currentValue(); }
>     SVGAnimatedBoolean& externalResourcesRequiredAnimated() { return m_externalResourcesRequired; }
> 
>diff --git a/Source/WebCore/svg/SVGFEBlendElement.h b/Source/WebCore/svg/SVGFEBlendElement.h
>index a9c98e427664b2e13c167078f1f0dc7cd50230ba..d155ca5fd8c2ec90ceb03f68e0a87fddbccaef45 100644
>--- a/Source/WebCore/svg/SVGFEBlendElement.h
>+++ b/Source/WebCore/svg/SVGFEBlendElement.h
>@@ -27,28 +27,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-struct SVGPropertyTraits<BlendMode> {
>-    static unsigned highestEnumValue() { return static_cast<unsigned>(BlendMode::Luminosity); }
>-
>-    static BlendMode fromString(const String& string)
>-    {
>-        BlendMode mode = BlendMode::Normal;
>-        parseBlendMode(string, mode);
>-        return mode;
>-    }
>-
>-    static String toString(BlendMode type)
>-    {
>-        if (type < BlendMode::PlusDarker)
>-            return blendModeName(type);
>-
>-        return emptyString();
>-    }
>-};
>-
> class SVGFEBlendElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEBlendElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEBlendElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEBlendElement> create(const QualifiedName&, Document&);
> 
>@@ -63,9 +45,7 @@ public:
> private:
>     SVGFEBlendElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEBlendElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEColorMatrixElement.h b/Source/WebCore/svg/SVGFEColorMatrixElement.h
>index 3ef24c94224868da77d0e80bcdf0c7465393f23e..064d390963497a55b9a2a8f02d7599a480962da8 100644
>--- a/Source/WebCore/svg/SVGFEColorMatrixElement.h
>+++ b/Source/WebCore/svg/SVGFEColorMatrixElement.h
>@@ -26,45 +26,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-struct SVGPropertyTraits<ColorMatrixType> {
>-    static unsigned highestEnumValue() { return FECOLORMATRIX_TYPE_LUMINANCETOALPHA; }
>-
>-    static String toString(ColorMatrixType type)
>-    {
>-        switch (type) {
>-        case FECOLORMATRIX_TYPE_UNKNOWN:
>-            return emptyString();
>-        case FECOLORMATRIX_TYPE_MATRIX:
>-            return "matrix"_s;
>-        case FECOLORMATRIX_TYPE_SATURATE:
>-            return "saturate"_s;
>-        case FECOLORMATRIX_TYPE_HUEROTATE:
>-            return "hueRotate"_s;
>-        case FECOLORMATRIX_TYPE_LUMINANCETOALPHA:
>-            return "luminanceToAlpha"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static ColorMatrixType fromString(const String& value)
>-    {
>-        if (value == "matrix")
>-            return FECOLORMATRIX_TYPE_MATRIX;
>-        if (value == "saturate")
>-            return FECOLORMATRIX_TYPE_SATURATE;
>-        if (value == "hueRotate")
>-            return FECOLORMATRIX_TYPE_HUEROTATE;
>-        if (value == "luminanceToAlpha")
>-            return FECOLORMATRIX_TYPE_LUMINANCETOALPHA;
>-        return FECOLORMATRIX_TYPE_UNKNOWN;
>-    }
>-};
>-
> class SVGFEColorMatrixElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEColorMatrixElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEColorMatrixElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEColorMatrixElement> create(const QualifiedName&, Document&);
> 
>@@ -79,9 +44,7 @@ public:
> private:
>     SVGFEColorMatrixElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEColorMatrixElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEComponentTransferElement.h b/Source/WebCore/svg/SVGFEComponentTransferElement.h
>index 526216e56016fab5224aabe9132064cdb03ad0bb..d175ba1b8391ef18e566a8a1d331645e4b3b22f1 100644
>--- a/Source/WebCore/svg/SVGFEComponentTransferElement.h
>+++ b/Source/WebCore/svg/SVGFEComponentTransferElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGFEComponentTransferElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEComponentTransferElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEComponentTransferElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEComponentTransferElement> create(const QualifiedName&, Document&);
> 
>@@ -37,9 +39,7 @@ public:
> private:
>     SVGFEComponentTransferElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEComponentTransferElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     // FIXME: svgAttributeChanged missing.
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFECompositeElement.h b/Source/WebCore/svg/SVGFECompositeElement.h
>index a33c982b3495e3abfd4f18756aa110299fc9c2c5..47d73911bd01423a6390be51885336ca7786c4f6 100644
>--- a/Source/WebCore/svg/SVGFECompositeElement.h
>+++ b/Source/WebCore/svg/SVGFECompositeElement.h
>@@ -26,60 +26,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-inline unsigned SVGIDLEnumLimits<CompositeOperationType>::highestExposedEnumValue() { return FECOMPOSITE_OPERATOR_ARITHMETIC; }
>-
>-template<>
>-struct SVGPropertyTraits<CompositeOperationType> {
>-    static unsigned highestEnumValue() { return FECOMPOSITE_OPERATOR_LIGHTER; }
>-
>-    static String toString(CompositeOperationType type)
>-    {
>-        switch (type) {
>-        case FECOMPOSITE_OPERATOR_UNKNOWN:
>-            return emptyString();
>-        case FECOMPOSITE_OPERATOR_OVER:
>-            return "over"_s;
>-        case FECOMPOSITE_OPERATOR_IN:
>-            return "in"_s;
>-        case FECOMPOSITE_OPERATOR_OUT:
>-            return "out"_s;
>-        case FECOMPOSITE_OPERATOR_ATOP:
>-            return "atop"_s;
>-        case FECOMPOSITE_OPERATOR_XOR:
>-            return "xor"_s;
>-        case FECOMPOSITE_OPERATOR_ARITHMETIC:
>-            return "arithmetic"_s;
>-        case FECOMPOSITE_OPERATOR_LIGHTER:
>-            return "lighter"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static CompositeOperationType fromString(const String& value)
>-    {
>-        if (value == "over")
>-            return FECOMPOSITE_OPERATOR_OVER;
>-        if (value == "in")
>-            return FECOMPOSITE_OPERATOR_IN;
>-        if (value == "out")
>-            return FECOMPOSITE_OPERATOR_OUT;
>-        if (value == "atop")
>-            return FECOMPOSITE_OPERATOR_ATOP;
>-        if (value == "xor")
>-            return FECOMPOSITE_OPERATOR_XOR;
>-        if (value == "arithmetic")
>-            return FECOMPOSITE_OPERATOR_ARITHMETIC;
>-        if (value == "lighter")
>-            return FECOMPOSITE_OPERATOR_LIGHTER;
>-        return FECOMPOSITE_OPERATOR_UNKNOWN;
>-    }
>-};
>-
> class SVGFECompositeElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFECompositeElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFECompositeElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFECompositeElement> create(const QualifiedName&, Document&);
> 
>@@ -102,9 +52,7 @@ public:
> private:
>     SVGFECompositeElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFECompositeElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEConvolveMatrixElement.h b/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>index cea1123faa918d5f1f15d2d433ec011f70211002..2181ddebdab3d5987f678829e28c8168c798867a 100644
>--- a/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>+++ b/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>@@ -25,42 +25,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-struct SVGPropertyTraits<EdgeModeType> {
>-    static unsigned highestEnumValue() { return EDGEMODE_NONE; }
>-    static EdgeModeType initialValue() { return EDGEMODE_NONE; }
>-
>-    static String toString(EdgeModeType type)
>-    {
>-        switch (type) {
>-        case EDGEMODE_UNKNOWN:
>-            return emptyString();
>-        case EDGEMODE_DUPLICATE:
>-            return "duplicate"_s;
>-        case EDGEMODE_WRAP:
>-            return "wrap"_s;
>-        case EDGEMODE_NONE:
>-            return "none"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static EdgeModeType fromString(const String& value)
>-    {
>-        if (value == "duplicate")
>-            return EDGEMODE_DUPLICATE;
>-        if (value == "wrap")
>-            return EDGEMODE_WRAP;
>-        if (value == "none")
>-            return EDGEMODE_NONE;
>-        return EDGEMODE_UNKNOWN;
>-    }
>-};
>-
> class SVGFEConvolveMatrixElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEConvolveMatrixElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEConvolveMatrixElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEConvolveMatrixElement> create(const QualifiedName&, Document&);
> 
>@@ -96,9 +64,7 @@ public:
> private:
>     SVGFEConvolveMatrixElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEConvolveMatrixElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEDiffuseLightingElement.h b/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>index 8d795990cf23e0c414920e2f17b1cce784c7f135..4b81b166f7dd7eed799bb414b25b9614e0883edb 100644
>--- a/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>+++ b/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>@@ -32,6 +32,8 @@ class SVGColor;
> 
> class SVGFEDiffuseLightingElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEDiffuseLightingElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDiffuseLightingElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEDiffuseLightingElement> create(const QualifiedName&, Document&);
>     void lightElementAttributeChanged(const SVGFELightElement*, const QualifiedName&);
>@@ -51,9 +53,7 @@ public:
> private:
>     SVGFEDiffuseLightingElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDiffuseLightingElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-    
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEDisplacementMapElement.h b/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>index 422f0cf7ea9505427b07bf0aefffb3b8444197fa..9de85da3400483684116f93587d604354c2e00e0 100644
>--- a/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>+++ b/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>@@ -25,45 +25,10 @@
> 
> namespace WebCore {
>  
>-template<>
>-struct SVGPropertyTraits<ChannelSelectorType> {
>-    static unsigned highestEnumValue() { return CHANNEL_A; }
>-
>-    static String toString(ChannelSelectorType type)
>-    {
>-        switch (type) {
>-        case CHANNEL_UNKNOWN:
>-            return emptyString();
>-        case CHANNEL_R:
>-            return "R"_s;
>-        case CHANNEL_G:
>-            return "G"_s;
>-        case CHANNEL_B:
>-            return "B"_s;
>-        case CHANNEL_A:
>-            return "A"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static ChannelSelectorType fromString(const String& value)
>-    {
>-        if (value == "R")
>-            return CHANNEL_R;
>-        if (value == "G")
>-            return CHANNEL_G;
>-        if (value == "B")
>-            return CHANNEL_B;
>-        if (value == "A")
>-            return CHANNEL_A;
>-        return CHANNEL_UNKNOWN;
>-    }
>-};
>-
> class SVGFEDisplacementMapElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEDisplacementMapElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDisplacementMapElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEDisplacementMapElement> create(const QualifiedName&, Document&);
> 
>@@ -84,9 +49,7 @@ public:
> private:
>     SVGFEDisplacementMapElement(const QualifiedName& tagName, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDisplacementMapElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEDropShadowElement.h b/Source/WebCore/svg/SVGFEDropShadowElement.h
>index 061cca2bed96c1aab0534d7a0913c314ce1be5f4..60061b2e4b854a882bf234f36d6e5738c77e5bcc 100644
>--- a/Source/WebCore/svg/SVGFEDropShadowElement.h
>+++ b/Source/WebCore/svg/SVGFEDropShadowElement.h
>@@ -27,6 +27,8 @@ namespace WebCore {
> 
> class SVGFEDropShadowElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEDropShadowElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDropShadowElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEDropShadowElement> create(const QualifiedName&, Document&);
>     
>@@ -47,9 +49,7 @@ public:
> private:
>     SVGFEDropShadowElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDropShadowElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEFloodElement.h b/Source/WebCore/svg/SVGFEFloodElement.h
>index b96a43aa313e75e4a3167248a1b6f5cf51fee911..70b23ed2b59f5bf7cd1068c7c392049dc3e7bc8b 100644
>--- a/Source/WebCore/svg/SVGFEFloodElement.h
>+++ b/Source/WebCore/svg/SVGFEFloodElement.h
>@@ -26,17 +26,17 @@ namespace WebCore {
> 
> class SVGFEFloodElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEFloodElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEFloodElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEFloodElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGFEFloodElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEFloodElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>-    bool setFilterEffectAttribute(FilterEffect*, const QualifiedName& attrName) override;
>-    RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>+    bool setFilterEffectAttribute(FilterEffect*, const QualifiedName& attrName) final;
>+    RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const final;
> 
>     PropertyRegistry m_propertyRegistry { *this };
> };
>diff --git a/Source/WebCore/svg/SVGFEGaussianBlurElement.h b/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>index b2d5e83cecd6da463b4a8c059f4f30ec2a4b5365..367d01a2475fc10ba3253e10f92d9e60380b7057 100644
>--- a/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>+++ b/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGFEGaussianBlurElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEGaussianBlurElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEGaussianBlurElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEGaussianBlurElement> create(const QualifiedName&, Document&);
> 
>@@ -47,9 +49,7 @@ public:
> private:
>     SVGFEGaussianBlurElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEGaussianBlurElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEImageElement.h b/Source/WebCore/svg/SVGFEImageElement.h
>index 7624990b358ab527b4d19e57f9dcdcebf9f5310e..17a50ea278321c66d5153f267aa60f943fda2988 100644
>--- a/Source/WebCore/svg/SVGFEImageElement.h
>+++ b/Source/WebCore/svg/SVGFEImageElement.h
>@@ -32,6 +32,8 @@ namespace WebCore {
> 
> class SVGFEImageElement final : public SVGFilterPrimitiveStandardAttributes, public SVGExternalResourcesRequired, public SVGURIReference, public CachedImageClient {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEImageElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEImageElement, SVGFilterPrimitiveStandardAttributes, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGFEImageElement> create(const QualifiedName&, Document&);
> 
>@@ -45,9 +47,7 @@ public:
> private:
>     SVGFEImageElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEImageElement, SVGFilterPrimitiveStandardAttributes, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFELightElement.h b/Source/WebCore/svg/SVGFELightElement.h
>index 2534d1d7ac9d54e8d06445e7a7e2f85abd0b4c5e..6ebdc429cb0f6a5b3935687ff44fc05e5883ad74 100644
>--- a/Source/WebCore/svg/SVGFELightElement.h
>+++ b/Source/WebCore/svg/SVGFELightElement.h
>@@ -31,6 +31,8 @@ class SVGFilterBuilder;
> 
> class SVGFELightElement : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFELightElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFELightElement, SVGElement>;
>+
> public:
>     virtual Ref<LightSource> lightSource(SVGFilterBuilder&) const = 0;
>     static SVGFELightElement* findLightElement(const SVGElement*);
>@@ -63,9 +65,7 @@ protected:
>     bool rendererIsNeeded(const RenderStyle&) override { return false; }
> 
> private:
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFELightElement, SVGElement>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
>     void childrenChanged(const ChildChange&) override;
>diff --git a/Source/WebCore/svg/SVGFEMergeElement.h b/Source/WebCore/svg/SVGFEMergeElement.h
>index 745086816f6976c6697dc51075802d283cf4e3c2..abeb6c1b17955aeb8c66f9093c5019d888a5b257 100644
>--- a/Source/WebCore/svg/SVGFEMergeElement.h
>+++ b/Source/WebCore/svg/SVGFEMergeElement.h
>@@ -26,15 +26,15 @@ namespace WebCore {
> 
> class SVGFEMergeElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEMergeElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMergeElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEMergeElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGFEMergeElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMergeElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
> 
>     PropertyRegistry m_propertyRegistry { *this };
>diff --git a/Source/WebCore/svg/SVGFEMergeNodeElement.h b/Source/WebCore/svg/SVGFEMergeNodeElement.h
>index 8da92361408a23b88f1a6af04b7a532b2a9cb070..b13dfe0878cf5ad63955eefd2803b39e2421b123 100644
>--- a/Source/WebCore/svg/SVGFEMergeNodeElement.h
>+++ b/Source/WebCore/svg/SVGFEMergeNodeElement.h
>@@ -27,6 +27,8 @@ namespace WebCore {
> 
> class SVGFEMergeNodeElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEMergeNodeElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMergeNodeElement, SVGElement>;
>+
> public:
>     static Ref<SVGFEMergeNodeElement> create(const QualifiedName&, Document&);
> 
>@@ -36,9 +38,7 @@ public:
> private:
>     SVGFEMergeNodeElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMergeNodeElement, SVGElement>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGFEMorphologyElement.h b/Source/WebCore/svg/SVGFEMorphologyElement.h
>index 99933555361a20541577b11245b48239b6d33b2d..6c32d2b1a9eb32c1e1f5fbe3b31621645dc32fb9 100644
>--- a/Source/WebCore/svg/SVGFEMorphologyElement.h
>+++ b/Source/WebCore/svg/SVGFEMorphologyElement.h
>@@ -25,37 +25,10 @@
> 
> namespace WebCore {
> 
>-template<>
>-struct SVGPropertyTraits<MorphologyOperatorType> {
>-    static unsigned highestEnumValue() { return FEMORPHOLOGY_OPERATOR_DILATE; }
>-
>-    static String toString(MorphologyOperatorType type)
>-    {
>-        switch (type) {
>-        case FEMORPHOLOGY_OPERATOR_UNKNOWN:
>-            return emptyString();
>-        case FEMORPHOLOGY_OPERATOR_ERODE:
>-            return "erode"_s;
>-        case FEMORPHOLOGY_OPERATOR_DILATE:
>-            return "dilate"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static MorphologyOperatorType fromString(const String& value)
>-    {
>-        if (value == "erode")
>-            return FEMORPHOLOGY_OPERATOR_ERODE;
>-        if (value == "dilate")
>-            return FEMORPHOLOGY_OPERATOR_DILATE;
>-        return FEMORPHOLOGY_OPERATOR_UNKNOWN;
>-    }
>-};
>-
> class SVGFEMorphologyElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEMorphologyElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMorphologyElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEMorphologyElement> create(const QualifiedName&, Document&);
> 
>@@ -74,9 +47,7 @@ public:
> private:
>     SVGFEMorphologyElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMorphologyElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEOffsetElement.h b/Source/WebCore/svg/SVGFEOffsetElement.h
>index 3d8d77dbef7839109e3b0bc70af01a9f0e62ba54..1c508b2c288e903fab45b75868d3e6362b927570 100644
>--- a/Source/WebCore/svg/SVGFEOffsetElement.h
>+++ b/Source/WebCore/svg/SVGFEOffsetElement.h
>@@ -27,6 +27,8 @@ namespace WebCore {
> 
> class SVGFEOffsetElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFEOffsetElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEOffsetElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFEOffsetElement> create(const QualifiedName&, Document&);
> 
>@@ -41,9 +43,7 @@ public:
> private:
>     SVGFEOffsetElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEOffsetElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFESpecularLightingElement.h b/Source/WebCore/svg/SVGFESpecularLightingElement.h
>index ce23cb5ae22c3f751e115c7082aba158b5a3cc09..7a756df5e49bfea6b21a73d90e635205c6185403 100644
>--- a/Source/WebCore/svg/SVGFESpecularLightingElement.h
>+++ b/Source/WebCore/svg/SVGFESpecularLightingElement.h
>@@ -30,6 +30,8 @@ namespace WebCore {
> 
> class SVGFESpecularLightingElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFESpecularLightingElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFESpecularLightingElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFESpecularLightingElement> create(const QualifiedName&, Document&);
>     void lightElementAttributeChanged(const SVGFELightElement*, const QualifiedName&);
>@@ -51,9 +53,7 @@ public:
> private:
>     SVGFESpecularLightingElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFESpecularLightingElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFETileElement.h b/Source/WebCore/svg/SVGFETileElement.h
>index adcc7a8d304cb332d9bae7ba582849c261f4b4d8..65647201912da637fa19b5c7f83e65ee6c822300 100644
>--- a/Source/WebCore/svg/SVGFETileElement.h
>+++ b/Source/WebCore/svg/SVGFETileElement.h
>@@ -27,6 +27,8 @@ namespace WebCore {
> 
> class SVGFETileElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFETileElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETileElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>     static Ref<SVGFETileElement> create(const QualifiedName&, Document&);
> 
>@@ -36,9 +38,7 @@ public:
> private:
>     SVGFETileElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETileElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFETurbulenceElement.cpp b/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>index 3e35d220e48a1ac5757f937bd33d06ad4d0d1eb6..58e7ca678e28ad2a74bd4371e827b4802606635c 100644
>--- a/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>+++ b/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>@@ -121,7 +121,7 @@ RefPtr<FilterEffect> SVGFETurbulenceElement::build(SVGFilterBuilder*, Filter& fi
> {
>     if (baseFrequencyX() < 0 || baseFrequencyY() < 0)
>         return nullptr;
>-    return FETurbulence::create(filter, type(), baseFrequencyX(), baseFrequencyY(), numOctaves(), seed(), stitchTiles() == SVG_STITCHTYPE_STITCH);
>+    return FETurbulence::create(filter, type(), baseFrequencyX(), baseFrequencyY(), numOctaves(), seed(), stitchTiles() == SVGStitchTypeStitch);
> }
> 
> }
>diff --git a/Source/WebCore/svg/SVGFETurbulenceElement.h b/Source/WebCore/svg/SVGFETurbulenceElement.h
>index cca7f85783f4886ec981f6fa1db962b9cb416c2e..7ca5e28bbbfc68e47f1259c9dcb8613b41892d8e 100644
>--- a/Source/WebCore/svg/SVGFETurbulenceElement.h
>+++ b/Source/WebCore/svg/SVGFETurbulenceElement.h
>@@ -26,73 +26,18 @@
> 
> namespace WebCore {
> 
>-enum SVGStitchOptions {
>-    SVG_STITCHTYPE_UNKNOWN  = 0,
>-    SVG_STITCHTYPE_STITCH   = 1,
>-    SVG_STITCHTYPE_NOSTITCH = 2
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGStitchOptions> {
>-    static unsigned highestEnumValue() { return SVG_STITCHTYPE_NOSTITCH; }
>-
>-    static String toString(SVGStitchOptions type)
>-    {
>-        switch (type) {
>-        case SVG_STITCHTYPE_UNKNOWN:
>-            return emptyString();
>-        case SVG_STITCHTYPE_STITCH:
>-            return "stitch"_s;
>-        case SVG_STITCHTYPE_NOSTITCH:
>-            return "noStitch"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGStitchOptions fromString(const String& value)
>-    {
>-        if (value == "stitch")
>-            return SVG_STITCHTYPE_STITCH;
>-        if (value == "noStitch")
>-            return SVG_STITCHTYPE_NOSTITCH;
>-        return SVG_STITCHTYPE_UNKNOWN;
>-    }
>-};
>-
>-template<>
>-struct SVGPropertyTraits<TurbulenceType> {
>-    static unsigned highestEnumValue() { return static_cast<unsigned>(TurbulenceType::Turbulence); }
>-
>-    static String toString(TurbulenceType type)
>-    {
>-        switch (type) {
>-        case TurbulenceType::Unknown:
>-            return emptyString();
>-        case TurbulenceType::FractalNoise:
>-            return "fractalNoise"_s;
>-        case TurbulenceType::Turbulence:
>-            return "turbulence"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static TurbulenceType fromString(const String& value)
>-    {
>-        if (value == "fractalNoise")
>-            return TurbulenceType::FractalNoise;
>-        if (value == "turbulence")
>-            return TurbulenceType::Turbulence;
>-        return TurbulenceType::Unknown;
>-    }
>-};
>-
> class SVGFETurbulenceElement final : public SVGFilterPrimitiveStandardAttributes {
>     WTF_MAKE_ISO_ALLOCATED(SVGFETurbulenceElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETurbulenceElement, SVGFilterPrimitiveStandardAttributes>;
>+
> public:
>+    // Forward declare enumerations in the W3C naming scheme, for IDL generation.
>+    enum {
>+        SVG_STITCHTYPE_UNKNOWN = SVGStitchTypeUnknown,
>+        SVG_STITCHTYPE_STITCH = SVGStitchTypeStitch,
>+        SVG_STITCHTYPE_NOSTITCH = SVGStitchTypeNoStitch,
>+    };
>+
>     static Ref<SVGFETurbulenceElement> create(const QualifiedName&, Document&);
> 
>     float baseFrequencyX() const { return m_baseFrequencyX->currentValue(); }
>@@ -112,9 +57,7 @@ public:
> private:
>     SVGFETurbulenceElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETurbulenceElement, SVGFilterPrimitiveStandardAttributes>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>@@ -126,7 +69,7 @@ private:
>     Ref<SVGAnimatedNumber> m_baseFrequencyY { SVGAnimatedNumber::create(this) };
>     Ref<SVGAnimatedInteger> m_numOctaves { SVGAnimatedInteger::create(this, 1) };
>     Ref<SVGAnimatedNumber> m_seed { SVGAnimatedNumber::create(this) };
>-    Ref<SVGAnimatedEnumeration> m_stitchTiles { SVGAnimatedEnumeration::create(this, SVG_STITCHTYPE_NOSTITCH) };
>+    Ref<SVGAnimatedEnumeration> m_stitchTiles { SVGAnimatedEnumeration::create(this, SVGStitchTypeNoStitch) };
>     Ref<SVGAnimatedEnumeration> m_type { SVGAnimatedEnumeration::create(this, TurbulenceType::Turbulence) };
> };
> 
>diff --git a/Source/WebCore/svg/SVGFilterElement.h b/Source/WebCore/svg/SVGFilterElement.h
>index e1f2f5bcec563df15c27f9fd4fe44bc88a34657c..11155e8b1c384d50ebe006528e5fda693db45f84 100644
>--- a/Source/WebCore/svg/SVGFilterElement.h
>+++ b/Source/WebCore/svg/SVGFilterElement.h
>@@ -32,6 +32,8 @@ namespace WebCore {
> 
> class SVGFilterElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGFilterElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFilterElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGFilterElement> create(const QualifiedName&, Document&);
> 
>@@ -52,9 +54,7 @@ public:
> private:
>     SVGFilterElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFilterElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
>     void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>index eb25b53a94d8e5fdd89285b583b732313e232010..cb81902cd1a7219b285ce43282f7c49798633bac 100644
>--- a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>+++ b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>@@ -36,14 +36,14 @@ class SVGFilterBuilder;
> class SVGFilterPrimitiveStandardAttributes : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFilterPrimitiveStandardAttributes);
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFilterPrimitiveStandardAttributes, SVGElement>;
>+
>     void setStandardAttributes(FilterEffect*) const;
> 
>     virtual RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const = 0;
>     // Returns true, if the new value is different from the old one.
>     virtual bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFilterPrimitiveStandardAttributes, SVGElement>;
>-
>     const SVGLengthValue& x() const { return m_x->currentValue(); }
>     const SVGLengthValue& y() const { return m_y->currentValue(); }
>     const SVGLengthValue& width() const { return m_width->currentValue(); }
>diff --git a/Source/WebCore/svg/SVGFitToViewBox.cpp b/Source/WebCore/svg/SVGFitToViewBox.cpp
>index d15e3546c1213e00dfa57c81b4a00b2efe30a973..3e37800bec2d6603bcc504ca77cdf543e14ad826 100644
>--- a/Source/WebCore/svg/SVGFitToViewBox.cpp
>+++ b/Source/WebCore/svg/SVGFitToViewBox.cpp
>@@ -35,7 +35,7 @@
> namespace WebCore {
> 
> SVGFitToViewBox::SVGFitToViewBox(SVGElement* contextElement, SVGPropertyAccess access)
>-    : m_viewBox(SVGAnimatedRect::create(contextElement, access))
>+    : m_viewBox(SVGAnimatedRect::create(contextElement, access, SVGPropertyState::Invalid))
>     , m_preserveAspectRatio(SVGAnimatedPreserveAspectRatio::create(contextElement, access))
> {
>     static std::once_flag onceFlag;
>@@ -48,13 +48,13 @@ SVGFitToViewBox::SVGFitToViewBox(SVGElement* contextElement, SVGPropertyAccess a
> void SVGFitToViewBox::setViewBox(const FloatRect& viewBox)
> {
>     m_viewBox->setBaseValInternal(viewBox);
>-    m_isViewBoxValid = true;
>+    m_viewBox->setState(SVGPropertyState::Clean);
> }
> 
> void SVGFitToViewBox::resetViewBox()
> {
>     m_viewBox->setBaseValInternal({ });
>-    m_isViewBoxValid = false;
>+    m_viewBox->setState(SVGPropertyState::Invalid);
> }
> 
> void SVGFitToViewBox::reset()
>@@ -63,35 +63,41 @@ void SVGFitToViewBox::reset()
>     resetPreserveAspectRatio();
> }
> 
>-bool SVGFitToViewBox::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+Optional<SVGParsingError> SVGFitToViewBox::parseAttribute(const QualifiedName& name, const AtomicString& value)
> {
>-    if (name == SVGNames::viewBoxAttr) {
>+    if (name.matches(SVGNames::viewBoxAttr)) {
>         FloatRect viewBox;
>-        if (!value.isNull() && parseViewBox(value, viewBox))
>-            setViewBox(viewBox);
>-        else
>+        if (auto error = parseViewBox(value, viewBox)) {
>             resetViewBox();
>-        return true;
>+            return error;
>+        }
>+        setViewBox(viewBox);
>+        return NoError;
>     }
> 
>-    if (name == SVGNames::preserveAspectRatioAttr) {
>+    if (name.matches(SVGNames::preserveAspectRatioAttr)) {
>         SVGPreserveAspectRatioValue preserveAspectRatio;
>-        preserveAspectRatio.parse(value);
>+        if (!preserveAspectRatio.parse(value)) {
>+            resetPreserveAspectRatio();
>+            return ParsingAttributeFailedError;
>+        }
>         setPreserveAspectRatio(preserveAspectRatio);
>-        return true;
>+        return NoError;
>     }
> 
>-    return false;
>+    return { };
> }
> 
>-bool SVGFitToViewBox::parseViewBox(const AtomicString& value, FloatRect& viewBox)
>+SVGParsingError SVGFitToViewBox::parseViewBox(const AtomicString& value, FloatRect& viewBox)
> {
>+    if (value.isNull())
>+        return UnexpectedEndOfAttributeError;
>     auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>     const UChar* characters = upconvertedCharacters;
>     return parseViewBox(characters, characters + value.length(), viewBox);
> }
> 
>-bool SVGFitToViewBox::parseViewBox(const UChar*& c, const UChar* end, FloatRect& viewBox, bool validate)
>+SVGParsingError SVGFitToViewBox::parseViewBox(const UChar*& c, const UChar* end, FloatRect& viewBox)
> {
>     String str(c, end - c);
> 
>@@ -103,36 +109,24 @@ bool SVGFitToViewBox::parseViewBox(const UChar*& c, const UChar* end, FloatRect&
>     float height = 0.0f;
>     bool valid = parseNumber(c, end, x) && parseNumber(c, end, y) && parseNumber(c, end, width) && parseNumber(c, end, height, false);
> 
>-    if (validate) {
>-        Document& document = m_viewBox->contextElement()->document();
>+    if (!valid)
>+        return ParsingAttributeFailedError;
> 
>-        if (!valid) {
>-            document.accessSVGExtensions().reportWarning("Problem parsing viewBox=\"" + str + "\"");
>-            return false;
>-        }
>+    // Check that width is positive.
>+    if (width < 0.0)
>+        return NegativeValueForbiddenError;
> 
>-        // Check that width is positive.
>-        if (width < 0.0) {
>-            document.accessSVGExtensions().reportError("A negative value for ViewBox width is not allowed");
>-            return false;
>-        }
>+    // Check that height is positive.
>+    if (height < 0.0)
>+        return NegativeValueForbiddenError;
> 
>-        // Check that height is positive.
>-        if (height < 0.0) {
>-            document.accessSVGExtensions().reportError("A negative value for ViewBox height is not allowed");
>-            return false;
>-        }
>-
>-        // Nothing should come after the last, fourth number.
>-        skipOptionalSVGSpaces(c, end);
>-        if (c < end) {
>-            document.accessSVGExtensions().reportWarning("Problem parsing viewBox=\"" + str + "\"");
>-            return false;
>-        }
>-    }
>+    // Nothing should come after the last, fourth number.
>+    skipOptionalSVGSpaces(c, end);
>+    if (c < end)
>+        return ParsingAttributeFailedError;
> 
>     viewBox = { x, y, width, height };
>-    return true;
>+    return NoError;
> }
> 
> AffineTransform SVGFitToViewBox::viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatioValue& preserveAspectRatio, float viewWidth, float viewHeight)
>diff --git a/Source/WebCore/svg/SVGFitToViewBox.h b/Source/WebCore/svg/SVGFitToViewBox.h
>index 7cc4231416019319d7e2b4d2d7d7636c379b8a4f..b311f4ba2204f5e9d6743879f6976e247dfec815 100644
>--- a/Source/WebCore/svg/SVGFitToViewBox.h
>+++ b/Source/WebCore/svg/SVGFitToViewBox.h
>@@ -36,42 +36,41 @@ class AffineTransform;
> class SVGFitToViewBox {
>     WTF_MAKE_NONCOPYABLE(SVGFitToViewBox);
> public:
>-    static AffineTransform viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatioValue&, float viewWidth, float viewHeight);
>-
>     using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFitToViewBox>;
> 
>+    static AffineTransform viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatioValue&, float viewWidth, float viewHeight);
>+
>     const FloatRect& viewBox() const { return m_viewBox->currentValue(); }
>     const SVGPreserveAspectRatioValue& preserveAspectRatio() const { return m_preserveAspectRatio->currentValue(); }
> 
>     SVGAnimatedRect& viewBoxAnimated() { return m_viewBox; }
>     SVGAnimatedPreserveAspectRatio& preserveAspectRatioAnimated() { return m_preserveAspectRatio; }
> 
>+    String viewBoxString() const { return SVGPropertyTraits<FloatRect>::toString(viewBox()); }
>+    String preserveAspectRatioString() const { return preserveAspectRatio().valueAsString(); }
>     void setViewBox(const FloatRect&);
>-    void resetViewBox();
> 
>     void setPreserveAspectRatio(const SVGPreserveAspectRatioValue& preserveAspectRatio) { m_preserveAspectRatio->setBaseValInternal(preserveAspectRatio); }
>-    void resetPreserveAspectRatio() { m_preserveAspectRatio->setBaseValInternal({ }); }
>-
>-    String viewBoxString() const { return SVGPropertyTraits<FloatRect>::toString(viewBox()); }
>-    String preserveAspectRatioString() const { return preserveAspectRatio().valueAsString(); }
>+    void reset();
> 
>-    bool hasValidViewBox() const { return m_isViewBoxValid; }
>-    bool hasEmptyViewBox() const { return m_isViewBoxValid && viewBox().isEmpty(); }
>+    bool hasValidViewBox() const { return m_viewBox->state() != SVGPropertyState::Invalid; }
>+    bool hasEmptyViewBox() const { return hasValidViewBox() && viewBox().isEmpty(); }
> 
> protected:
>     SVGFitToViewBox(SVGElement* contextElement, SVGPropertyAccess = SVGPropertyAccess::ReadWrite);
> 
>     static bool isKnownAttribute(const QualifiedName& attributeName) { return PropertyRegistry::isKnownAttribute(attributeName); }
> 
>-    void reset();
>-    bool parseAttribute(const QualifiedName&, const AtomicString&);
>-    bool parseViewBox(const AtomicString& value, FloatRect& viewBox);
>-    bool parseViewBox(const UChar*& start, const UChar* end, FloatRect& viewBox, bool validate = true);
>+    Optional<SVGParsingError> parseAttribute(const QualifiedName&, const AtomicString&);
>+    SVGParsingError parseViewBox(const AtomicString& value, FloatRect& viewBox);
>+    SVGParsingError parseViewBox(const UChar*& start, const UChar* end, FloatRect& viewBox);
> 
> private:
>+    void resetViewBox();
>+    void resetPreserveAspectRatio() { m_preserveAspectRatio->setBaseValInternal({ }); }
>+
>     Ref<SVGAnimatedRect> m_viewBox;
>     Ref<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
>-    bool m_isViewBoxValid { false };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGFontElement.h b/Source/WebCore/svg/SVGFontElement.h
>index cd1e8ea0b274d8cc8d647eaab61d0ef75bd95748..a662a0bd8ee9cb5e3d3a6da2190631b8872f2eec 100644
>--- a/Source/WebCore/svg/SVGFontElement.h
>+++ b/Source/WebCore/svg/SVGFontElement.h
>@@ -44,16 +44,16 @@ struct SVGKerningPair {
> 
> class SVGFontElement final : public SVGElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontElement, SVGElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGFontElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGFontElement(const QualifiedName&, Document&);
> 
>-    bool rendererIsNeeded(const RenderStyle&) final { return false; }
>-
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontElement, SVGElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>+    bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
>     PropertyRegistry m_propertyRegistry { *this };
> };
>diff --git a/Source/WebCore/svg/SVGFontFaceElement.h b/Source/WebCore/svg/SVGFontFaceElement.h
>index 8f8ba5892be280798ee41dc00bd1b3cb7d3098a9..24f74eebd843829fad683c03051208ae21cdf9e4 100644
>--- a/Source/WebCore/svg/SVGFontFaceElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceElement.h
>@@ -32,6 +32,8 @@ class StyleRuleFontFace;
> 
> class SVGFontFaceElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontFaceElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontFaceElement, SVGElement>;
>+
> public:
>     static Ref<SVGFontFaceElement> create(const QualifiedName&, Document&);
> 
>@@ -57,6 +59,7 @@ private:
>     SVGFontFaceElement(const QualifiedName&, Document&);
>     ~SVGFontFaceElement();
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
> 
>     void childrenChanged(const ChildChange&) final;
>@@ -65,6 +68,7 @@ private:
> 
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
>+    PropertyRegistry m_propertyRegistry { *this };
>     Ref<StyleRuleFontFace> m_fontFaceRule;
>     SVGFontElement* m_fontElement;
> };
>diff --git a/Source/WebCore/svg/SVGFontFaceFormatElement.h b/Source/WebCore/svg/SVGFontFaceFormatElement.h
>index 056075ee9ab37cf8ce874632980e7c210843538f..235e0c8f83a31c7d9534dc118c8f5e16d76c5d43 100644
>--- a/Source/WebCore/svg/SVGFontFaceFormatElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceFormatElement.h
>@@ -27,14 +27,19 @@ namespace WebCore {
> 
> class SVGFontFaceFormatElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontFaceFormatElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontFaceFormatElement, SVGElement>;
>+
> public:
>     static Ref<SVGFontFaceFormatElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGFontFaceFormatElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void childrenChanged(const ChildChange&) final;
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGFontFaceNameElement.h b/Source/WebCore/svg/SVGFontFaceNameElement.h
>index 867cdc85f6ed4474922f72e8d9370931593686b6..42b20f6d6587cdd26d5710211d1d0d9786b6c568 100644
>--- a/Source/WebCore/svg/SVGFontFaceNameElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceNameElement.h
>@@ -29,6 +29,8 @@ class CSSFontFaceSrcValue;
> 
> class SVGFontFaceNameElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontFaceNameElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontFaceNameElement, SVGElement>;
>+
> public:
>     static Ref<SVGFontFaceNameElement> create(const QualifiedName&, Document&);
>     
>@@ -37,7 +39,10 @@ public:
> private:
>     SVGFontFaceNameElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGFontFaceSrcElement.h b/Source/WebCore/svg/SVGFontFaceSrcElement.h
>index 416968c61f5af19216624da2b1c6189f7bd7429a..7befa862c598053e041b71c88e48df0f7c227cb8 100644
>--- a/Source/WebCore/svg/SVGFontFaceSrcElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceSrcElement.h
>@@ -29,6 +29,8 @@ class CSSValueList;
> 
> class SVGFontFaceSrcElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontFaceSrcElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontFaceSrcElement, SVGElement>;
>+
> public:
>     static Ref<SVGFontFaceSrcElement> create(const QualifiedName&, Document&);
> 
>@@ -37,8 +39,11 @@ public:
> private:
>     SVGFontFaceSrcElement(const QualifiedName&, Document&);
>     
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void childrenChanged(const ChildChange&) final;
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGFontFaceUriElement.h b/Source/WebCore/svg/SVGFontFaceUriElement.h
>index c78a2bca97f4fa359df1a67f0ede0048199810b3..d7c90db84cd50bb83ad669fb42c09632b8a52b53 100644
>--- a/Source/WebCore/svg/SVGFontFaceUriElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceUriElement.h
>@@ -31,6 +31,8 @@ class CSSFontFaceSrcValue;
> 
> class SVGFontFaceUriElement final : public SVGElement, public CachedFontClient {
>     WTF_MAKE_ISO_ALLOCATED(SVGFontFaceUriElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFontFaceUriElement, SVGElement>;
>+
> public:
>     static Ref<SVGFontFaceUriElement> create(const QualifiedName&, Document&);
> 
>@@ -40,14 +42,17 @@ public:
> 
> private:
>     SVGFontFaceUriElement(const QualifiedName&, Document&);
>-    
>+
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void childrenChanged(const ChildChange&) final;
>+
>     InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
>     void loadFont();
> 
>+    PropertyRegistry m_propertyRegistry { *this };
>     CachedResourceHandle<CachedFont> m_cachedFont;
> };
> 
>diff --git a/Source/WebCore/svg/SVGForeignObjectElement.h b/Source/WebCore/svg/SVGForeignObjectElement.h
>index fb57468a06fba108a512f9be5e26011b2879f6f7..0ac851dd69fa0dc031f83b62b89a092aac3e2c28 100644
>--- a/Source/WebCore/svg/SVGForeignObjectElement.h
>+++ b/Source/WebCore/svg/SVGForeignObjectElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGForeignObjectElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGForeignObjectElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGForeignObjectElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGForeignObjectElement> create(const QualifiedName&, Document&);
> 
>@@ -44,9 +46,7 @@ public:
> private:
>     SVGForeignObjectElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGForeignObjectElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGGElement.h b/Source/WebCore/svg/SVGGElement.h
>index cb206ae34ad2cbbbf34801c12ae40197902b6f5f..adaebbed1535164a1a09a292caaa54276d95b999 100644
>--- a/Source/WebCore/svg/SVGGElement.h
>+++ b/Source/WebCore/svg/SVGGElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGGElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGGElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGGElement> create(const QualifiedName&, Document&);
>     static Ref<SVGGElement> create(Document&);
>@@ -37,9 +39,7 @@ private:
> 
>     RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGGeometryElement.h b/Source/WebCore/svg/SVGGeometryElement.h
>index d24e622d1e02a259d03bc8d6ff52d1f06cb86f56..3cf247d7dec01f975f0a4c21eb94e711a8dba3e0 100644
>--- a/Source/WebCore/svg/SVGGeometryElement.h
>+++ b/Source/WebCore/svg/SVGGeometryElement.h
>@@ -33,15 +33,16 @@ class SVGPoint;
> 
> class SVGGeometryElement : public SVGGraphicsElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGGeometryElement);
>+    
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGeometryElement, SVGGraphicsElement>;
>+
>     virtual float getTotalLength() const;
>     virtual Ref<SVGPoint> getPointAtLength(float distance) const;
> 
>     bool isPointInFill(DOMPointInit&&);
>     bool isPointInStroke(DOMPointInit&&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGeometryElement, SVGGraphicsElement>;
>-
>     float pathLength() const { return m_pathLength->currentValue(); }
>     SVGAnimatedNumber& pathLengthAnimated() { return m_pathLength; }
> 
>diff --git a/Source/WebCore/svg/SVGGlyphElement.h b/Source/WebCore/svg/SVGGlyphElement.h
>index 9ff991e720cb82f8fa0a06a60080500ba6988d81..90c693895fd30a7afda2beb7df70b233e45bd484 100644
>--- a/Source/WebCore/svg/SVGGlyphElement.h
>+++ b/Source/WebCore/svg/SVGGlyphElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGGlyphElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGGlyphElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGlyphElement, SVGElement>;
>+
> public:
>     static Ref<SVGGlyphElement> create(const QualifiedName&, Document&);
> 
>@@ -38,7 +40,10 @@ public:
> private:
>     SVGGlyphElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGGlyphRefElement.h b/Source/WebCore/svg/SVGGlyphRefElement.h
>index be046ee73625aed90bcd7df56abe9e1d715d9869..592b8cfab8316a7f9729f0ca99253b71c5250139 100644
>--- a/Source/WebCore/svg/SVGGlyphRefElement.h
>+++ b/Source/WebCore/svg/SVGGlyphRefElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGGlyphRefElement final : public SVGElement, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGGlyphRefElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGlyphRefElement, SVGElement, SVGURIReference>;
>+
> public:
>     static Ref<SVGGlyphRefElement> create(const QualifiedName&, Document&);
> 
>@@ -46,9 +48,7 @@ public:
> private:
>     SVGGlyphRefElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGlyphRefElement, SVGElement, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
>diff --git a/Source/WebCore/svg/SVGGradientElement.h b/Source/WebCore/svg/SVGGradientElement.h
>index 21b210c5951dcb1cec5c642ea89ec3622481f7af..0b6c7d5f2dd932ca59c1a3f25553025dc3159ca4 100644
>--- a/Source/WebCore/svg/SVGGradientElement.h
>+++ b/Source/WebCore/svg/SVGGradientElement.h
>@@ -30,49 +30,12 @@
> 
> namespace WebCore {
> 
>-enum SVGSpreadMethodType {
>-    SVGSpreadMethodUnknown = 0,
>-    SVGSpreadMethodPad,
>-    SVGSpreadMethodReflect,
>-    SVGSpreadMethodRepeat
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGSpreadMethodType> {
>-    static unsigned highestEnumValue() { return SVGSpreadMethodRepeat; }
>-
>-    static String toString(SVGSpreadMethodType type)
>-    {
>-        switch (type) {
>-        case SVGSpreadMethodUnknown:
>-            return emptyString();
>-        case SVGSpreadMethodPad:
>-            return "pad"_s;
>-        case SVGSpreadMethodReflect:
>-            return "reflect"_s;
>-        case SVGSpreadMethodRepeat:
>-            return "repeat"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGSpreadMethodType fromString(const String& value)
>-    {
>-        if (value == "pad")
>-            return SVGSpreadMethodPad;
>-        if (value == "reflect")
>-            return SVGSpreadMethodReflect;
>-        if (value == "repeat")
>-            return SVGSpreadMethodRepeat;
>-        return SVGSpreadMethodUnknown;
>-    }
>-};
>-
> class SVGGradientElement : public SVGElement, public SVGExternalResourcesRequired, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGGradientElement);
>+
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGradientElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
>     enum {
>         SVG_SPREADMETHOD_UNKNOWN = SVGSpreadMethodUnknown,
>         SVG_SPREADMETHOD_PAD = SVGSpreadMethodReflect,
>@@ -82,8 +45,6 @@ public:
> 
>     Vector<Gradient::ColorStop> buildStops();
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGradientElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>-
>     SVGSpreadMethodType spreadMethod() const { return m_spreadMethod->currentValue<SVGSpreadMethodType>(); }
>     SVGUnitTypes::SVGUnitType gradientUnits() const { return m_gradientUnits->currentValue<SVGUnitTypes::SVGUnitType>(); }
>     const SVGTransformList& gradientTransform() const { return m_gradientTransform->currentValue(); }
>diff --git a/Source/WebCore/svg/SVGGraphicsElement.h b/Source/WebCore/svg/SVGGraphicsElement.h
>index d516e59b385906b287982cb90fd8f760ffa7754a..7ec44f1bc3fc1a1360b20bc094047206b06ac1ac 100644
>--- a/Source/WebCore/svg/SVGGraphicsElement.h
>+++ b/Source/WebCore/svg/SVGGraphicsElement.h
>@@ -34,7 +34,10 @@ class SVGMatrix;
> 
> class SVGGraphicsElement : public SVGElement, public SVGTransformable, public SVGTests {
>     WTF_MAKE_ISO_ALLOCATED(SVGGraphicsElement);
>+
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGraphicsElement, SVGElement, SVGTests>;
>+
>     virtual ~SVGGraphicsElement();
> 
>     Ref<SVGMatrix> getCTMForBindings();
>@@ -62,8 +65,6 @@ public:
> 
>     size_t approximateMemoryCost() const override { return sizeof(*this); }
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGraphicsElement, SVGElement, SVGTests>;
>-
>     const SVGTransformList& transform() const { return m_transform->currentValue(); }
>     SVGAnimatedTransformList& transformAnimated() { return m_transform; }
> 
>diff --git a/Source/WebCore/svg/SVGHKernElement.h b/Source/WebCore/svg/SVGHKernElement.h
>index 747b0327d698637c8f65e7be9044088454365133..f2935f00d206df3315e101e57435ab5de0ce90e0 100644
>--- a/Source/WebCore/svg/SVGHKernElement.h
>+++ b/Source/WebCore/svg/SVGHKernElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGHKernElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGHKernElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGHKernElement, SVGElement>;
>+
> public:
>     static Ref<SVGHKernElement> create(const QualifiedName&, Document&);
> 
>@@ -37,7 +39,10 @@ public:
> private:
>     SVGHKernElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGImageElement.h b/Source/WebCore/svg/SVGImageElement.h
>index dcd7a0826ad49a2efd6d108bb11a289e963954d4..d31f032db9cc91dd814f022e2f8d0edd7c02579b 100644
>--- a/Source/WebCore/svg/SVGImageElement.h
>+++ b/Source/WebCore/svg/SVGImageElement.h
>@@ -30,6 +30,8 @@ namespace WebCore {
> 
> class SVGImageElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGImageElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGImageElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGImageElement> create(const QualifiedName&, Document&);
> 
>@@ -51,9 +53,7 @@ public:
> private:
>     SVGImageElement(const QualifiedName&, Document&);
>     
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGImageElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGLength.h b/Source/WebCore/svg/SVGLength.h
>index ff0fd3514b263e138d5cca907f3a7987b6f3b9ef..9bbb5df8255aef60a58c134f2458ae18fc9021b6 100644
>--- a/Source/WebCore/svg/SVGLength.h
>+++ b/Source/WebCore/svg/SVGLength.h
>@@ -66,6 +66,23 @@ public:
>         return adoptRef(*new SVGLength(owner, access, value));
>     }
> 
>+    static Expected<Ref<SVGLength>, SVGParsingError> create(const UChar*& ptr, const UChar* end, SVGLengthMode lengthMode)
>+    {
>+        const UChar* start = ptr;
>+        while (ptr < end && *ptr != ',' && !isSVGSpace(*ptr))
>+            ptr++;
>+
>+        String string(start, ptr - start);
>+        if (string.isEmpty())
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        SVGLengthValue value(lengthMode);
>+        if (value.setValueAsString(string).hasException())
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        return SVGLength::create(value);
>+    }
>+
>     template<typename T>
>     static ExceptionOr<Ref<SVGLength>> create(ExceptionOr<T>&& value)
>     {
>diff --git a/Source/WebCore/svg/SVGLengthList.h b/Source/WebCore/svg/SVGLengthList.h
>index b0147fa234f4d9a88f9fc9f31d5f388973167695..dfe65698589369587d0d9836c2974a5490fbde08 100644
>--- a/Source/WebCore/svg/SVGLengthList.h
>+++ b/Source/WebCore/svg/SVGLengthList.h
>@@ -52,46 +52,11 @@ public:
> 
>     SVGLengthMode lengthMode() const { return m_lengthMode; }
> 
>-    bool parse(const String& value)
>+    SVGParsingError parse(const String& value)
>     {
>-        clearItems();
>-
>-        auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>-        const UChar* ptr = upconvertedCharacters;
>-        const UChar* end = ptr + value.length();
>-        while (ptr < end) {
>-            const UChar* start = ptr;
>-            while (ptr < end && *ptr != ',' && !isSVGSpace(*ptr))
>-                ptr++;
>-            if (ptr == start)
>-                break;
>-
>-            String valueString(start, ptr - start);
>-            SVGLengthValue value(m_lengthMode);
>-            if (value.setValueAsString(valueString).hasException())
>-                break;
>-
>-            append(SVGLength::create(value));
>-            skipOptionalSVGSpacesOrDelimiter(ptr, end);
>-        }
>-
>-        return ptr == end;
>+        return Base::parse(value, m_lengthMode);
>     }
> 
>-    String valueAsString() const override
>-    {
>-        StringBuilder builder;
>-
>-        for (const auto& length : m_items) {
>-            if (builder.length())
>-                builder.append(' ');
>-
>-            builder.append(length->value().valueAsString());
>-        }
>-
>-        return builder.toString();
>-    }
>-    
> private:
>     SVGLengthList(SVGLengthMode lengthMode)
>         : m_lengthMode(lengthMode)
>diff --git a/Source/WebCore/svg/SVGLengthValue.h b/Source/WebCore/svg/SVGLengthValue.h
>index 92661b21e53e700ca1bafee51e1f7c5ac9d6e345..97b55137d248516236b535f49c766261b2b04ba6 100644
>--- a/Source/WebCore/svg/SVGLengthValue.h
>+++ b/Source/WebCore/svg/SVGLengthValue.h
>@@ -145,17 +145,6 @@ private:
>     unsigned m_unit;
> };
> 
>-template<> struct SVGPropertyTraits<SVGLengthValue> {
>-    static SVGLengthValue initialValue() { return { }; }
>-    static Optional<SVGLengthValue> parse(const QualifiedName& attrName, const String& string)
>-    {
>-        SVGLengthValue length;
>-        length.setValueAsString(string, SVGLengthValue::lengthModeForAnimatedLengthAttribute(attrName)).hasException();
>-        return length;
>-    }
>-    static String toString(const SVGLengthValue& length) { return length.valueAsString(); }
>-};
>-
> WTF::TextStream& operator<<(WTF::TextStream&, const SVGLengthValue&);
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGLineElement.h b/Source/WebCore/svg/SVGLineElement.h
>index dd029a3d5bed8250248799c94ccc6c781d27a2cf..e1fbea9e250ceb4779beb74f7f3e245d48ba4705 100644
>--- a/Source/WebCore/svg/SVGLineElement.h
>+++ b/Source/WebCore/svg/SVGLineElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGLineElement final : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGLineElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLineElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGLineElement> create(const QualifiedName&, Document&);
> 
>@@ -45,9 +47,7 @@ public:
> private:
>     SVGLineElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLineElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGLinearGradientElement.h b/Source/WebCore/svg/SVGLinearGradientElement.h
>index 04a31dd47c0b219163838af5c5e09a9285c3a26f..8ad1ea9d2499025b533ce6aa069ddeb3694f2148 100644
>--- a/Source/WebCore/svg/SVGLinearGradientElement.h
>+++ b/Source/WebCore/svg/SVGLinearGradientElement.h
>@@ -30,6 +30,8 @@ struct LinearGradientAttributes;
> 
> class SVGLinearGradientElement final : public SVGGradientElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGLinearGradientElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLinearGradientElement, SVGGradientElement>;
>+
> public:
>     static Ref<SVGLinearGradientElement> create(const QualifiedName&, Document&);
> 
>@@ -48,9 +50,7 @@ public:
> private:
>     SVGLinearGradientElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLinearGradientElement, SVGGradientElement>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGMPathElement.h b/Source/WebCore/svg/SVGMPathElement.h
>index d65903ceb83a9bcf6154b78ccaa4a6ba354b3fe6..670e64d9abc3397877794a2ba137fb4e2ad30949 100644
>--- a/Source/WebCore/svg/SVGMPathElement.h
>+++ b/Source/WebCore/svg/SVGMPathElement.h
>@@ -31,6 +31,8 @@ class SVGPathElement;
> 
> class SVGMPathElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGMPathElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMPathElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGMPathElement> create(const QualifiedName&, Document&);
> 
>@@ -43,9 +45,7 @@ public:
> private:
>     SVGMPathElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMPathElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGMarkerElement.h b/Source/WebCore/svg/SVGMarkerElement.h
>index f034584403baba263f18bec1c1438c76e8681b50..a63bc5350bf85887154991fab84398b37644798c 100644
>--- a/Source/WebCore/svg/SVGMarkerElement.h
>+++ b/Source/WebCore/svg/SVGMarkerElement.h
>@@ -30,6 +30,8 @@ namespace WebCore {
> 
> class SVGMarkerElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGFitToViewBox {
>     WTF_MAKE_ISO_ALLOCATED(SVGMarkerElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMarkerElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>+
> public:
>     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
>     enum {
>@@ -71,9 +73,7 @@ public:
> private:
>     SVGMarkerElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMarkerElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
>     void childrenChanged(const ChildChange&) override;
>diff --git a/Source/WebCore/svg/SVGMarkerTypes.h b/Source/WebCore/svg/SVGMarkerTypes.h
>index b811d2e9dbcb4d263bbfc3c00c274c372a38e07a..826a0f54485e085044a4697b989193c0b817f8fd 100644
>--- a/Source/WebCore/svg/SVGMarkerTypes.h
>+++ b/Source/WebCore/svg/SVGMarkerTypes.h
>@@ -26,99 +26,32 @@
> #pragma once
> 
> #include "SVGAngleValue.h"
>+#include "SVGEnumType.h"
> #include "SVGPropertyTraits.h"
> 
> namespace WebCore {
> 
>-enum SVGMarkerUnitsType {
>-    SVGMarkerUnitsUnknown = 0,
>-    SVGMarkerUnitsUserSpaceOnUse,
>-    SVGMarkerUnitsStrokeWidth
>-};
>-
>-enum SVGMarkerOrientType {
>-    SVGMarkerOrientUnknown = 0,
>-    SVGMarkerOrientAuto,
>-    SVGMarkerOrientAngle,
>-    SVGMarkerOrientAutoStartReverse,
>-    
>-    // Add new elements before here.
>-    SVGMarkerOrientMax
>-};
>-    
> template<>
>-struct SVGPropertyTraits<SVGMarkerUnitsType> {
>-    static unsigned highestEnumValue() { return SVGMarkerUnitsStrokeWidth; }
>-    static String toString(SVGMarkerUnitsType type)
>-    {
>-        switch (type) {
>-        case SVGMarkerUnitsUnknown:
>-            return emptyString();
>-        case SVGMarkerUnitsUserSpaceOnUse:
>-            return "userSpaceOnUse"_s;
>-        case SVGMarkerUnitsStrokeWidth:
>-            return "strokeWidth"_s;
>-        }
>-        
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-    static SVGMarkerUnitsType fromString(const String& value)
>+struct SVGPropertyTraits<std::pair<SVGAngleValue, SVGMarkerOrientType>> {
>+    static Expected<std::pair<SVGAngleValue, SVGMarkerOrientType>, SVGParsingError> parse(const String& string)
>     {
>-        if (value == "userSpaceOnUse")
>-            return SVGMarkerUnitsUserSpaceOnUse;
>-        if (value == "strokeWidth")
>-            return SVGMarkerUnitsStrokeWidth;
>-        return SVGMarkerUnitsUnknown;
>-    }
>-};
>+        SVGAngleValue angle;
>+        if (string.isEmpty())
>+            return std::make_pair(angle, SVGMarkerOrientAngle);
> 
>-template<>
>-struct SVGPropertyTraits<SVGMarkerOrientType> {
>-    static const String autoString()
>-    {
>-        static const NeverDestroyed<String> autoString = MAKE_STATIC_STRING_IMPL("auto");
>-        return autoString;
>-    }
>-    static const String autoStartReverseString()
>-    {
>-        static const NeverDestroyed<String> autoStartReverseString = MAKE_STATIC_STRING_IMPL("auto-start-reverse");
>-        return autoStartReverseString;
>-    }
>-    static unsigned highestEnumValue() { return SVGMarkerOrientAutoStartReverse; }
>-    static SVGMarkerOrientType fromString(const String& string)
>-    {
>-        if (string == autoString())
>-            return SVGMarkerOrientAuto;
>-        if (string == autoStartReverseString())
>-            return SVGMarkerOrientAutoStartReverse;
>-        return SVGMarkerOrientUnknown;
>-    }
>-    static String toString(SVGMarkerOrientType type)
>-    {
>-        if (type == SVGMarkerOrientAuto)
>-            return autoString();
>-        if (type == SVGMarkerOrientAutoStartReverse)
>-            return autoStartReverseString();
>-        return emptyString();
>-    }
>-};
>+        SVGMarkerOrientType orientType = SVGPropertyTraits<SVGMarkerOrientType>::fromString(string);
>+        if (orientType != SVGMarkerOrientUnknown)
>+            return std::make_pair(angle, orientType);
> 
>-template<>
>-inline unsigned SVGIDLEnumLimits<SVGMarkerOrientType>::highestExposedEnumValue() { return SVGMarkerOrientAngle; }
>+        auto result = angle.setValueAsString(string);
>+        if (result.hasException())
>+            return makeUnexpected(ParsingAttributeFailedError);
> 
>-template<>
>-struct SVGPropertyTraits<std::pair<SVGAngleValue, SVGMarkerOrientType>> {
>+        return std::make_pair(angle, SVGMarkerOrientAngle);
>+    }
>     static std::pair<SVGAngleValue, SVGMarkerOrientType> fromString(const String& string)
>     {
>-        SVGAngleValue angle;
>-        SVGMarkerOrientType orientType = SVGPropertyTraits<SVGMarkerOrientType>::fromString(string);
>-        if (orientType == SVGMarkerOrientUnknown) {
>-            auto result = angle.setValueAsString(string);
>-            if (!result.hasException())
>-                orientType = SVGMarkerOrientAngle;
>-        }
>-        return std::make_pair(angle, orientType);
>+        return parse(string).value_or(std::make_pair<SVGAngleValue, SVGMarkerOrientType>({ }, SVGMarkerOrientUnknown));
>     }
> };
> 
>diff --git a/Source/WebCore/svg/SVGMaskElement.h b/Source/WebCore/svg/SVGMaskElement.h
>index c5e358dffba9de4d703f6c48207cdf1a36a4c0be..c3162f3854472c9bf1c8d6f0d8a1bd56d4acfd6d 100644
>--- a/Source/WebCore/svg/SVGMaskElement.h
>+++ b/Source/WebCore/svg/SVGMaskElement.h
>@@ -30,6 +30,8 @@ namespace WebCore {
> 
> class SVGMaskElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGTests {
>     WTF_MAKE_ISO_ALLOCATED(SVGMaskElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMaskElement, SVGElement, SVGExternalResourcesRequired, SVGTests>;
>+
> public:
>     static Ref<SVGMaskElement> create(const QualifiedName&, Document&);
> 
>@@ -50,9 +52,7 @@ public:
> private:
>     SVGMaskElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMaskElement, SVGElement, SVGExternalResourcesRequired, SVGTests>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
>     void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/svg/SVGMetadataElement.h b/Source/WebCore/svg/SVGMetadataElement.h
>index 6b04112b7fa1437a9a4d30dde6112a75861c2602..db9be7801f329012b5b1215b4d673495cc15634e 100644
>--- a/Source/WebCore/svg/SVGMetadataElement.h
>+++ b/Source/WebCore/svg/SVGMetadataElement.h
>@@ -26,13 +26,18 @@ namespace WebCore {
> 
> class SVGMetadataElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGMetadataElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMetadataElement, SVGElement>;
>+
> public:
>     static Ref<SVGMetadataElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGMetadataElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+    
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGMissingGlyphElement.h b/Source/WebCore/svg/SVGMissingGlyphElement.h
>index 44b3746a827e5f57ed9555a0ce6fd7ccac5a147a..449d41447d41399796247d393202aa587d2fbc0d 100644
>--- a/Source/WebCore/svg/SVGMissingGlyphElement.h
>+++ b/Source/WebCore/svg/SVGMissingGlyphElement.h
>@@ -28,13 +28,18 @@ namespace WebCore {
> 
> class SVGMissingGlyphElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGMissingGlyphElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMissingGlyphElement, SVGElement>;
>+
> public:
>     static Ref<SVGMissingGlyphElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGMissingGlyphElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGNumber.h b/Source/WebCore/svg/SVGNumber.h
>index 23c82e44e677d8d360c96154c795dab8776a1fa4..92f5a1ad8ce4abcfdde7ca4b6e0d7bfd50998f46 100644
>--- a/Source/WebCore/svg/SVGNumber.h
>+++ b/Source/WebCore/svg/SVGNumber.h
>@@ -45,6 +45,14 @@ public:
>         return adoptRef(*new SVGNumber(owner, access, value));
>     }
> 
>+    static Expected<Ref<SVGNumber>, SVGParsingError> create(const UChar*& ptr, const UChar* end)
>+    {
>+        float number = 0;
>+        if (!parseNumber(ptr, end, number))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+        return SVGNumber::create(number);
>+    }
>+
>     template<typename T>
>     static ExceptionOr<Ref<SVGNumber>> create(ExceptionOr<T>&& value)
>     {
>diff --git a/Source/WebCore/svg/SVGNumberList.h b/Source/WebCore/svg/SVGNumberList.h
>index 5b5d57e846f431aaf5c08dbc9a4c34abe84d6d1f..a5e73e1909dbf4614ac07ef31e3ab45272eff31d 100644
>--- a/Source/WebCore/svg/SVGNumberList.h
>+++ b/Source/WebCore/svg/SVGNumberList.h
>@@ -49,40 +49,6 @@ public:
>     {
>         return adoptRef(*new SVGNumberList(other, access));
>     }
>-
>-    bool parse(const String& value)
>-    {
>-        clearItems();
>-
>-        float number = 0;
>-        auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>-        const UChar* ptr = upconvertedCharacters;
>-        const UChar* end = ptr + value.length();
>-
>-        // The spec (section 4.1) strangely doesn't allow leading whitespace.
>-        // We might choose to violate that intentionally.
>-        while (ptr < end) {
>-            if (!parseNumber(ptr, end, number))
>-                break;
>-            append(SVGNumber::create(number));
>-        }
>-
>-        return ptr == end;
>-    }
>-
>-    String valueAsString() const override
>-    {
>-        StringBuilder builder;
>-
>-        for (const auto& number : m_items) {
>-            if (builder.length())
>-                builder.append(' ');
>-
>-            builder.appendFixedPrecisionNumber(number->value());
>-        }
>-
>-        return builder.toString();
>-    }
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGParsingError.h b/Source/WebCore/svg/SVGParsingError.h
>index 1b9a701b9b28996568550ad7b89b373d74363972..54afdbf7c275f42fc85da315bcfd7b9b61f2a88e 100644
>--- a/Source/WebCore/svg/SVGParsingError.h
>+++ b/Source/WebCore/svg/SVGParsingError.h
>@@ -1,6 +1,6 @@
> /*
>  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
>- * Copyright (C) 2011 Apple, Inc. All rights reserved.
>+ * Copyright (C) 2011-2019 Apple, Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -30,8 +30,40 @@ namespace WebCore {
> 
> enum SVGParsingError {
>     NoError,
>-    ParsingAttributeFailedError,
>-    NegativeValueForbiddenError
>+    UnexpectedEndOfAttributeError,
>+    ZeroValueForbiddenError,
>+    NegativeValueForbiddenError,
>+    UnrecognizedEnumValueError,
>+    ParsingAttributeFailedError
> };
> 
>+enum SVGParsingOptions {
>+    NoOptions             = 0,
>+    ForbidNegative        = 1 << 0,
>+    ForbidZero            = 1 << 2,
>+    ForbidZeroAndNegative = ForbidNegative | ForbidZero,
>+    AllowPercentage       = 1 << 3
>+};
>+
>+template<typename T> struct SVGNumericParsingValidator;
>+
>+template<typename T>
>+struct SVGNumericParsingValidator {
>+    static constexpr SVGParsingError validate(T t, SVGParsingOptions parsingOptions)
>+    {
>+        static_assert(std::is_arithmetic<T>::value, "This function can only check the value of a numeric.");
>+        if ((parsingOptions & ForbidNegative) && t < 0)
>+            return NegativeValueForbiddenError;
>+        if ((parsingOptions & ForbidZero) && !t)
>+            return ZeroValueForbiddenError;
>+        return NoError;
>+    }
>+};
>+
>+template<typename T>
>+constexpr auto validateNumeric(T t, SVGParsingOptions parsingOptions)
>+{
>+    return SVGNumericParsingValidator<T>::validate(t, parsingOptions);
>+}
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGPathElement.cpp b/Source/WebCore/svg/SVGPathElement.cpp
>index 07fc2a9a33f41875354ec9816776446913a253a8..c21f0b0109848dfd4aa37ddc4e240800da201d9b 100644
>--- a/Source/WebCore/svg/SVGPathElement.cpp
>+++ b/Source/WebCore/svg/SVGPathElement.cpp
>@@ -109,23 +109,17 @@ void SVGPathElement::removedFromAncestor(RemovalType removalType, ContainerNode&
> 
> float SVGPathElement::getTotalLength() const
> {
>-    float totalLength = 0;
>-    getTotalLengthOfSVGPathByteStream(pathByteStream(), totalLength);
>-    return totalLength;
>+    return totalLengthOfSVGPathByteStream(pathByteStream()).valueOr(0);
> }
> 
> Ref<SVGPoint> SVGPathElement::getPointAtLength(float length) const
> {
>-    FloatPoint point;
>-    getPointAtLengthOfSVGPathByteStream(pathByteStream(), length, point);
>-    return SVGPoint::create(point);
>+    return SVGPoint::create(pointAtLengthOfSVGPathByteStream(pathByteStream(), length).valueOr(FloatPoint()));
> }
> 
> unsigned SVGPathElement::getPathSegAtLength(float length) const
> {
>-    unsigned pathSeg = 0;
>-    getSVGPathSegAtLengthFromSVGPathByteStream(pathByteStream(), length, pathSeg);
>-    return pathSeg;
>+    return pathSegAtLengthFromSVGPathByteStream(pathByteStream(), length).valueOr(0);
> }
> 
> FloatRect SVGPathElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
>diff --git a/Source/WebCore/svg/SVGPathElement.h b/Source/WebCore/svg/SVGPathElement.h
>index 6774d0698aa42fb53737de1d895070831358e7a7..f2508cae90dc74cf616d8f1e30ca6b3d555f7d1c 100644
>--- a/Source/WebCore/svg/SVGPathElement.h
>+++ b/Source/WebCore/svg/SVGPathElement.h
>@@ -35,6 +35,8 @@ class SVGPoint;
> 
> class SVGPathElement final : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGPathElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPathElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGPathElement> create(const QualifiedName&, Document&);
>     
>@@ -108,9 +110,7 @@ public:
> private:
>     SVGPathElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPathElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-    
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGPathUtilities.cpp b/Source/WebCore/svg/SVGPathUtilities.cpp
>index db8f929ad19b5be0f7949ba5b5244180fcaa7aa8..5d426eedb027a7126b514fa99f92749e67e0a49b 100644
>--- a/Source/WebCore/svg/SVGPathUtilities.cpp
>+++ b/Source/WebCore/svg/SVGPathUtilities.cpp
>@@ -193,48 +193,49 @@ bool addToSVGPathByteStream(SVGPathByteStream& streamToAppendTo, const SVGPathBy
>     return SVGPathBlender::addAnimatedPath(fromSource, bySource, builder, repeatCount);
> }
> 
>-bool getSVGPathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream& stream, float length, unsigned& pathSeg)
>+Optional<unsigned> pathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream& stream, float length)
> {
>     if (stream.isEmpty())
>-        return false;
>+        return WTF::nullopt;
> 
>     PathTraversalState traversalState(PathTraversalState::Action::SegmentAtLength);
>     SVGPathTraversalStateBuilder builder(traversalState, length);
> 
>     SVGPathByteStreamSource source(stream);
>-    bool ok = SVGPathParser::parse(source, builder);
>-    pathSeg = builder.pathSegmentIndex();
>-    return ok;
>+    if (!SVGPathParser::parse(source, builder))
>+        return WTF::nullopt;
>+
>+    return builder.pathSegmentIndex();
> }
> 
>-bool getTotalLengthOfSVGPathByteStream(const SVGPathByteStream& stream, float& totalLength)
>+Optional<float> totalLengthOfSVGPathByteStream(const SVGPathByteStream& stream)
> {
>     if (stream.isEmpty())
>-        return false;
>+        return WTF::nullopt;
> 
>     PathTraversalState traversalState(PathTraversalState::Action::TotalLength);
>-
>     SVGPathTraversalStateBuilder builder(traversalState);
> 
>     SVGPathByteStreamSource source(stream);
>-    bool ok = SVGPathParser::parse(source, builder);
>-    totalLength = builder.totalLength();
>-    return ok;
>+    if (!SVGPathParser::parse(source, builder))
>+        return WTF::nullopt;
>+
>+    return builder.totalLength();
> }
> 
>-bool getPointAtLengthOfSVGPathByteStream(const SVGPathByteStream& stream, float length, FloatPoint& point)
>+Optional<FloatPoint> pointAtLengthOfSVGPathByteStream(const SVGPathByteStream& stream, float length)
> {
>     if (stream.isEmpty())
>-        return false;
>+        return WTF::nullopt;
> 
>     PathTraversalState traversalState(PathTraversalState::Action::VectorAtLength);
>-
>     SVGPathTraversalStateBuilder builder(traversalState, length);
> 
>     SVGPathByteStreamSource source(stream);
>-    bool ok = SVGPathParser::parse(source, builder);
>-    point = builder.currentPoint();
>-    return ok;
>+    if (!SVGPathParser::parse(source, builder))
>+        return WTF::nullopt;
>+    
>+    return builder.currentPoint();
> }
> 
> }
>diff --git a/Source/WebCore/svg/SVGPathUtilities.h b/Source/WebCore/svg/SVGPathUtilities.h
>index 490ff7c660c9d95f9f1e454341f117fa8126d378..11bb53df51bfe8b5f6b89dfa04f44aedbaff5767 100644
>--- a/Source/WebCore/svg/SVGPathUtilities.h
>+++ b/Source/WebCore/svg/SVGPathUtilities.h
>@@ -53,8 +53,8 @@ bool canBlendSVGPathByteStreams(const SVGPathByteStream& from, const SVGPathByte
> bool buildAnimatedSVGPathByteStream(const SVGPathByteStream& from, const SVGPathByteStream& to, SVGPathByteStream& result, float progress);
> bool addToSVGPathByteStream(SVGPathByteStream& streamToAppendTo, const SVGPathByteStream& from, unsigned repeatCount = 1);
> 
>-bool getSVGPathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream&, float length, unsigned& pathSeg);
>-bool getTotalLengthOfSVGPathByteStream(const SVGPathByteStream&, float& totalLength);
>-bool getPointAtLengthOfSVGPathByteStream(const SVGPathByteStream&, float length, FloatPoint&);
>+Optional<unsigned> pathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream&, float length);
>+Optional<float> totalLengthOfSVGPathByteStream(const SVGPathByteStream&);
>+Optional<FloatPoint> pointAtLengthOfSVGPathByteStream(const SVGPathByteStream&, float length);
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGPatternElement.h b/Source/WebCore/svg/SVGPatternElement.h
>index 36cdefb0b7634db27ddded816608c9c176c1be0f..e92d3151c940b9f5ccb044a2b702115701f341dc 100644
>--- a/Source/WebCore/svg/SVGPatternElement.h
>+++ b/Source/WebCore/svg/SVGPatternElement.h
>@@ -35,6 +35,8 @@ struct PatternAttributes;
>  
> class SVGPatternElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGFitToViewBox, public SVGTests, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGPatternElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPatternElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGTests, SVGURIReference>;
>+
> public:
>     static Ref<SVGPatternElement> create(const QualifiedName&, Document&);
> 
>@@ -61,9 +63,7 @@ public:
> private:
>     SVGPatternElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPatternElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGTests, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
>     void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/svg/SVGPoint.h b/Source/WebCore/svg/SVGPoint.h
>index 77445b9fcb1fb40b51396e192e734586c6354b52..b1faf612c056add573f7205434d54a0e9bcf1391 100644
>--- a/Source/WebCore/svg/SVGPoint.h
>+++ b/Source/WebCore/svg/SVGPoint.h
>@@ -44,6 +44,19 @@ public:
>         return adoptRef(*new SVGPoint(value));
>     }
> 
>+    static Expected<Ref<SVGPoint>, SVGParsingError> create(const UChar*& ptr, const UChar* end)
>+    {
>+        float xPos = 0.0f;
>+        if (!parseNumber(ptr, end, xPos))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        float yPos = 0.0f;
>+        if (!parseNumber(ptr, end, yPos, false))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        return SVGPoint::create({ xPos, yPos });
>+    }
>+
>     template<typename T>
>     static ExceptionOr<Ref<SVGPoint>> create(ExceptionOr<T>&& value)
>     {
>@@ -88,7 +101,6 @@ public:
>         return adoptRef(*new SVGPoint(newPoint));
>     }
> 
>-private:
>     String valueAsString() const override
>     {
>         return SVGPropertyTraits<FloatPoint>::toString(m_value);
>diff --git a/Source/WebCore/svg/SVGPointList.h b/Source/WebCore/svg/SVGPointList.h
>index 8c6c50b0e3bace536ae50ebb28c1b46e15749e81..dbec89bfa8989e4320370e2cc04267b5ce247f3f 100644
>--- a/Source/WebCore/svg/SVGPointList.h
>+++ b/Source/WebCore/svg/SVGPointList.h
>@@ -49,57 +49,6 @@ public:
>     {
>         return adoptRef(*new SVGPointList(other, access));
>     }
>-
>-    bool parse(const String& value)
>-    {
>-        clearItems();
>-
>-        auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>-        const UChar* cur = upconvertedCharacters;
>-        const UChar* end = cur + value.length();
>-
>-        skipOptionalSVGSpaces(cur, end);
>-
>-        bool delimParsed = false;
>-        while (cur < end) {
>-            delimParsed = false;
>-            float xPos = 0.0f;
>-            if (!parseNumber(cur, end, xPos))
>-                return false;
>-
>-            float yPos = 0.0f;
>-            if (!parseNumber(cur, end, yPos, false))
>-                return false;
>-
>-            skipOptionalSVGSpaces(cur, end);
>-
>-            if (cur < end && *cur == ',') {
>-                delimParsed = true;
>-                cur++;
>-            }
>-            skipOptionalSVGSpaces(cur, end);
>-
>-            append(SVGPoint::create({ xPos, yPos }));
>-        }
>-
>-        return !delimParsed;
>-    }
>-
>-    String valueAsString() const override
>-    {
>-        StringBuilder builder;
>-
>-        for (const auto& point : m_items) {
>-            if (builder.length())
>-                builder.append(' ');
>-
>-            builder.appendFixedPrecisionNumber(point->x());
>-            builder.append(' ');
>-            builder.appendFixedPrecisionNumber(point->y());
>-        }
>-
>-        return builder.toString();
>-    }
> };
> 
> }
>diff --git a/Source/WebCore/svg/SVGPolyElement.cpp b/Source/WebCore/svg/SVGPolyElement.cpp
>index c2fe2eaa897d78b69b095c6dcf350c29f0fcbbb6..c9552c66b46b0eb21060f61adcb83ef5d222a9e7 100644
>--- a/Source/WebCore/svg/SVGPolyElement.cpp
>+++ b/Source/WebCore/svg/SVGPolyElement.cpp
>@@ -46,7 +46,7 @@ SVGPolyElement::SVGPolyElement(const QualifiedName& tagName, Document& document)
> void SVGPolyElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
> {
>     if (name == SVGNames::pointsAttr) {
>-        if (!m_points->baseVal()->parse(value))
>+        if (m_points->baseVal()->parse(value) != NoError)
>             document().accessSVGExtensions().reportError("Problem parsing points=\"" + value + "\"");
>         return;
>     }
>diff --git a/Source/WebCore/svg/SVGPolyElement.h b/Source/WebCore/svg/SVGPolyElement.h
>index 67224903ef6310e2bd2b17912189634459d25f2b..f226819c05b6353e54a85455f66b439bd50b3dec 100644
>--- a/Source/WebCore/svg/SVGPolyElement.h
>+++ b/Source/WebCore/svg/SVGPolyElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGPolyElement : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGPolyElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPolyElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     const SVGPointList& points() const { return m_points->currentValue(); }
> 
>@@ -41,9 +43,7 @@ protected:
>     SVGPolyElement(const QualifiedName&, Document&);
> 
> private:
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPolyElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override; 
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGPreserveAspectRatioValue.cpp b/Source/WebCore/svg/SVGPreserveAspectRatioValue.cpp
>index d0bc716620f7a8a51ec634af7be94bbf5101e755..7e446e2caf056f7318adfa8c92ecd9aa7569f5ef 100644
>--- a/Source/WebCore/svg/SVGPreserveAspectRatioValue.cpp
>+++ b/Source/WebCore/svg/SVGPreserveAspectRatioValue.cpp
>@@ -58,11 +58,11 @@ ExceptionOr<void> SVGPreserveAspectRatioValue::setMeetOrSlice(unsigned short mee
>     return { };
> }
> 
>-void SVGPreserveAspectRatioValue::parse(const String& value)
>+bool SVGPreserveAspectRatioValue::parse(const String& value)
> {
>     auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>     const UChar* begin = upconvertedCharacters;
>-    parseInternal(begin, begin + value.length(), true);
>+    return parseInternal(begin, begin + value.length(), true);
> }
> 
> bool SVGPreserveAspectRatioValue::parse(const UChar*& currParam, const UChar* end, bool validate)
>diff --git a/Source/WebCore/svg/SVGPreserveAspectRatioValue.h b/Source/WebCore/svg/SVGPreserveAspectRatioValue.h
>index 415b8723f8d30864c1b3fd788cc3b989bad7ef9c..f2d6096a336847a060bd96aafe22604d23c8936b 100644
>--- a/Source/WebCore/svg/SVGPreserveAspectRatioValue.h
>+++ b/Source/WebCore/svg/SVGPreserveAspectRatioValue.h
>@@ -64,7 +64,7 @@ public:
> 
>     AffineTransform getCTM(float logicalX, float logicalY, float logicalWidth, float logicalHeight, float physicalWidth, float physicalHeight) const;
> 
>-    void parse(const String&);
>+    bool parse(const String&);
>     bool parse(const UChar*& currParam, const UChar* end, bool validate);
> 
>     String valueAsString() const;
>@@ -76,11 +76,4 @@ private:
>     bool parseInternal(const UChar*& currParam, const UChar* end, bool validate);
> };
> 
>-template<> struct SVGPropertyTraits<SVGPreserveAspectRatioValue> {
>-    static SVGPreserveAspectRatioValue initialValue() { return SVGPreserveAspectRatioValue(); }
>-    static SVGPreserveAspectRatioValue fromString(const String& string) { return SVGPreserveAspectRatioValue(string); }
>-    static Optional<SVGPreserveAspectRatioValue> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(const SVGPreserveAspectRatioValue& type) { return type.valueAsString(); }
>-};
>-
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGRadialGradientElement.h b/Source/WebCore/svg/SVGRadialGradientElement.h
>index b88a35a4328af8c6640f22eda614f91ebfe6a597..51bb84cd6f0c12c71ff7307d1ec66b23e83854b9 100644
>--- a/Source/WebCore/svg/SVGRadialGradientElement.h
>+++ b/Source/WebCore/svg/SVGRadialGradientElement.h
>@@ -30,6 +30,8 @@ struct RadialGradientAttributes;
> 
> class SVGRadialGradientElement final : public SVGGradientElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGRadialGradientElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRadialGradientElement, SVGGradientElement>;
>+
> public:
>     static Ref<SVGRadialGradientElement> create(const QualifiedName&, Document&);
> 
>@@ -52,9 +54,7 @@ public:
> private:
>     SVGRadialGradientElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRadialGradientElement, SVGGradientElement>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGRect.h b/Source/WebCore/svg/SVGRect.h
>index 90018e186b192ac3be6f0550df811627fbd7e9f2..42f79375020a31d2773d76c371ad56f50c768f7c 100644
>--- a/Source/WebCore/svg/SVGRect.h
>+++ b/Source/WebCore/svg/SVGRect.h
>@@ -41,6 +41,11 @@ public:
>         return adoptRef(*new SVGRect(owner, access, value));
>     }
> 
>+    static Ref<SVGRect> create(SVGPropertyOwner* owner, SVGPropertyAccess access, SVGPropertyState state)
>+    {
>+        return adoptRef(*new SVGRect(owner, access, state));
>+    }
>+
>     template<typename T>
>     static ExceptionOr<Ref<SVGRect>> create(ExceptionOr<T>&& value)
>     {
>diff --git a/Source/WebCore/svg/SVGRectElement.h b/Source/WebCore/svg/SVGRectElement.h
>index c392e1e2e5c6e497dd7c89f2b3709cbf75776056..80460829817c77d6368cd400d0178db6eee0e333 100644
>--- a/Source/WebCore/svg/SVGRectElement.h
>+++ b/Source/WebCore/svg/SVGRectElement.h
>@@ -29,6 +29,8 @@ namespace WebCore {
> 
> class SVGRectElement final : public SVGGeometryElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGRectElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRectElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGRectElement> create(const QualifiedName&, Document&);
> 
>@@ -49,9 +51,7 @@ public:
> private:
>     SVGRectElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRectElement, SVGGeometryElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGSVGElement.cpp b/Source/WebCore/svg/SVGSVGElement.cpp
>index 9bf0342332aeb44dcdb49ba9432b11cbce026baa..b7fc7fd438507195b473c96175b07b18f3d7a899 100644
>--- a/Source/WebCore/svg/SVGSVGElement.cpp
>+++ b/Source/WebCore/svg/SVGSVGElement.cpp
>@@ -252,12 +252,16 @@ void SVGSVGElement::parseAttribute(const QualifiedName& name, const AtomicString
>         m_height->setBaseValInternal(length);
>     }
> 
>-    reportAttributeParsingError(parseError, name, value);
>-
>     SVGGraphicsElement::parseAttribute(name, value);
>     SVGExternalResourcesRequired::parseAttribute(name, value);
>-    SVGFitToViewBox::parseAttribute(name, value);
>-    SVGZoomAndPan::parseAttribute(name, value);
>+
>+    if (auto error = SVGFitToViewBox::parseAttribute(name, value))
>+        parseError = *error;
>+    
>+    if (auto error = SVGZoomAndPan::parseAttribute(name, value))
>+        parseError = *error;
>+
>+    reportAttributeParsingError(parseError, name, value);
> }
> 
> void SVGSVGElement::svgAttributeChanged(const QualifiedName& attrName)
>@@ -651,7 +655,7 @@ bool SVGSVGElement::scrollToFragment(const String& fragmentIdentifier)
>     if (fragmentIdentifier.startsWith("svgView(")) {
>         if (!view)
>             view = &currentView(); // Create the SVGViewSpec.
>-        if (view->parseViewSpec(fragmentIdentifier))
>+        if (view->parseViewSpec(fragmentIdentifier) == NoError)
>             m_useCurrentView = true;
>         else
>             view->reset();
>diff --git a/Source/WebCore/svg/SVGSVGElement.h b/Source/WebCore/svg/SVGSVGElement.h
>index 960f85ada0afee58accb00c41e0b44fe7b6798e1..69982d4abc9b0a6f5ccf39517cfb24ebfb5539b0 100644
>--- a/Source/WebCore/svg/SVGSVGElement.h
>+++ b/Source/WebCore/svg/SVGSVGElement.h
>@@ -40,6 +40,8 @@ class SVGViewSpec;
> 
> class SVGSVGElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired, public SVGFitToViewBox, public SVGZoomAndPan {
>     WTF_MAKE_ISO_ALLOCATED(SVGSVGElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSVGElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>+
> public: // DOM
>     const AtomicString& contentScriptType() const;
>     void setContentScriptType(const AtomicString&);
>@@ -131,11 +133,10 @@ private:
>     SVGSVGElement(const QualifiedName&, Document&);
>     virtual ~SVGSVGElement();
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSVGElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-    
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
>+
>     bool selfHasRelativeLengths() const override;
>     bool isValid() const override;
> 
>diff --git a/Source/WebCore/svg/SVGScriptElement.h b/Source/WebCore/svg/SVGScriptElement.h
>index f15f3b7cf6f93af148d5032a10dd2b0167afabaf..0a26ea83c583ce5ecafd92274b9f4dba8b1a5ef3 100644
>--- a/Source/WebCore/svg/SVGScriptElement.h
>+++ b/Source/WebCore/svg/SVGScriptElement.h
>@@ -31,6 +31,8 @@ namespace WebCore {
> 
> class SVGScriptElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGURIReference, public ScriptElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGScriptElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGScriptElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGScriptElement> create(const QualifiedName&, Document&, bool wasInsertedByParser);
> 
>@@ -40,9 +42,7 @@ public:
> private:
>     SVGScriptElement(const QualifiedName&, Document&, bool wasInsertedByParser, bool alreadyStarted);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGScriptElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGStopElement.h b/Source/WebCore/svg/SVGStopElement.h
>index 8104fbbd7f6cfcdb73c60d3703d4ee668741a30a..b8c4c06c4375bf582d17bf323239a78c815ff39b 100644
>--- a/Source/WebCore/svg/SVGStopElement.h
>+++ b/Source/WebCore/svg/SVGStopElement.h
>@@ -27,6 +27,8 @@ namespace WebCore {
> 
> class SVGStopElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGStopElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGStopElement, SVGElement>;
>+
> public:
>     static Ref<SVGStopElement> create(const QualifiedName&, Document&);
> 
>@@ -38,9 +40,7 @@ public:
> private:
>     SVGStopElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGStopElement, SVGElement>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     void svgAttributeChanged(const QualifiedName&) final;
> 
>diff --git a/Source/WebCore/svg/SVGStringList.h b/Source/WebCore/svg/SVGStringList.h
>index d1e01069b12c7e90602af002fe293c40d4b70ec5..350e8a8135701b21b1c16cc4c2632ddcfb8678b0 100644
>--- a/Source/WebCore/svg/SVGStringList.h
>+++ b/Source/WebCore/svg/SVGStringList.h
>@@ -25,7 +25,6 @@
> 
> #pragma once
> 
>-#include "SVGParserUtilities.h"
> #include "SVGPrimitiveList.h"
> #include <wtf/text/StringBuilder.h>
> 
>@@ -42,47 +41,15 @@ public:
>         return adoptRef(*new SVGStringList(owner));
>     }
> 
>-    void reset(const String& string)
>+    SVGParsingError parse(const String& string)
>     {
>-        parse(string, ' ');
>+        SVGParsingError error = Base::parse(string);
> 
>         // Add empty string, if list is empty.
>         if (m_items.isEmpty())
>             m_items.append(emptyString());
>-    }
>-
>-    bool parse(const String& data, UChar delimiter)
>-    {
>-        clearItems();
>-
>-        auto upconvertedCharacters = StringView(data).upconvertedCharacters();
>-        const UChar* ptr = upconvertedCharacters;
>-        const UChar* end = ptr + data.length();
>-        while (ptr < end) {
>-            const UChar* start = ptr;
>-            while (ptr < end && *ptr != delimiter && !isSVGSpace(*ptr))
>-                ptr++;
>-            if (ptr == start)
>-                break;
>-            m_items.append(String(start, ptr - start));
>-            skipOptionalSVGSpacesOrDelimiter(ptr, end, delimiter);
>-        }
>-
>-        return ptr == end;
>-    }
>-
>-    String valueAsString() const override
>-    {
>-        StringBuilder builder;
>-
>-        for (auto string : m_items) {
>-            if (builder.length())
>-                builder.append(' ');
>-
>-            builder.append(string);
>-        }
>-
>-        return builder.toString();
>+        
>+        return error;
>     }
> };
> 
>diff --git a/Source/WebCore/svg/SVGStyleElement.h b/Source/WebCore/svg/SVGStyleElement.h
>index 41a937ed19e849e5403a4174f639034735fe3462..c180e0c5ef81592cfa430940bf8caca38f7de21a 100644
>--- a/Source/WebCore/svg/SVGStyleElement.h
>+++ b/Source/WebCore/svg/SVGStyleElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGStyleElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGStyleElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGStyleElement, SVGElement>;
>+
> public:
>     static Ref<SVGStyleElement> create(const QualifiedName&, Document&, bool createdByParser);
>     virtual ~SVGStyleElement();
>@@ -46,6 +48,7 @@ public:
> private:
>     SVGStyleElement(const QualifiedName&, Document&, bool createdByParser);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
>     InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
>     void removedFromAncestor(RemovalType, ContainerNode&) final;
>@@ -62,6 +65,7 @@ private:
> 
>     String title() const final;
> 
>+    PropertyRegistry m_propertyRegistry { *this };
>     InlineStyleSheetOwner m_styleSheetOwner;
>     Timer m_svgLoadEventTimer;
> };
>diff --git a/Source/WebCore/svg/SVGSwitchElement.h b/Source/WebCore/svg/SVGSwitchElement.h
>index 3d14a4faffa14e741ab996a38281f4270a75e284..8df1d2d0c9b68c24e9f77fcc74df2ab5a32fa2af 100644
>--- a/Source/WebCore/svg/SVGSwitchElement.h
>+++ b/Source/WebCore/svg/SVGSwitchElement.h
>@@ -28,13 +28,14 @@ namespace WebCore {
> 
> class SVGSwitchElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGSwitchElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSwitchElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
> public:
>     static Ref<SVGSwitchElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGSwitchElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSwitchElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>     bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGSymbolElement.h b/Source/WebCore/svg/SVGSymbolElement.h
>index 8c4afdedc9c2bb0ffa2ef0ecf3806d3c3f483b76..e21d50752d0766f4e05f32574a870aabc8f90f86 100644
>--- a/Source/WebCore/svg/SVGSymbolElement.h
>+++ b/Source/WebCore/svg/SVGSymbolElement.h
>@@ -29,17 +29,18 @@ namespace WebCore {
> 
> class SVGSymbolElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGFitToViewBox {
>     WTF_MAKE_ISO_ALLOCATED(SVGSymbolElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSymbolElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>+
> public:
>     static Ref<SVGSymbolElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGSymbolElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSymbolElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
>+
>     RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
> 
>     bool selfHasRelativeLengths() const override;
>diff --git a/Source/WebCore/svg/SVGTRefElement.h b/Source/WebCore/svg/SVGTRefElement.h
>index 8e816f5469bcec8b9f53080408ae6347a6c0613c..90d0bd229fe5a3f9e65f5c30e3ecfe4c37bae4ba 100644
>--- a/Source/WebCore/svg/SVGTRefElement.h
>+++ b/Source/WebCore/svg/SVGTRefElement.h
>@@ -30,6 +30,8 @@ class SVGTRefTargetEventListener;
> 
> class SVGTRefElement final : public SVGTextPositioningElement, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGTRefElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTRefElement, SVGTextPositioningElement, SVGURIReference>;
>+
> public:
>     static Ref<SVGTRefElement> create(const QualifiedName&, Document&);
> 
>@@ -39,9 +41,7 @@ private:
>     SVGTRefElement(const QualifiedName&, Document&);
>     virtual ~SVGTRefElement();
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTRefElement, SVGTextPositioningElement, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGTSpanElement.h b/Source/WebCore/svg/SVGTSpanElement.h
>index 5b22ea02c8a45a5262ac02ec49ab887809cff3cd..ea3c1f11cc153e067cd833d51333aecb0a3e4423 100644
>--- a/Source/WebCore/svg/SVGTSpanElement.h
>+++ b/Source/WebCore/svg/SVGTSpanElement.h
>@@ -26,15 +26,20 @@ namespace WebCore {
> 
> class SVGTSpanElement final : public SVGTextPositioningElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGTSpanElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTSpanElement, SVGTextPositioningElement>;
>+
> public:
>     static Ref<SVGTSpanElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGTSpanElement(const QualifiedName&, Document&);
>-            
>+
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>     bool childShouldCreateRenderer(const Node&) const override;
>     bool rendererIsNeeded(const RenderStyle&) override;
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGTests.cpp b/Source/WebCore/svg/SVGTests.cpp
>index 45523044f84066fe022c03d1595e8f32a9f7c0d5..9bc70019c17348e880e1430eea63425eb6ec40ca 100644
>--- a/Source/WebCore/svg/SVGTests.cpp
>+++ b/Source/WebCore/svg/SVGTests.cpp
>@@ -150,11 +150,11 @@ bool SVGTests::isValid() const
> void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomicString& value)
> {
>     if (attributeName == requiredFeaturesAttr)
>-        m_requiredFeatures->reset(value);
>+        m_requiredFeatures->parse(value);
>     if (attributeName == requiredExtensionsAttr)
>-        m_requiredExtensions->reset(value);
>+        m_requiredExtensions->parse(value);
>     if (attributeName == systemLanguageAttr)
>-        m_systemLanguage->reset(value);
>+        m_systemLanguage->parse(value);
> }
> 
> void SVGTests::svgAttributeChanged(const QualifiedName& attrName)
>diff --git a/Source/WebCore/svg/SVGTests.h b/Source/WebCore/svg/SVGTests.h
>index 449270d9f9d0f897ddff9e7c15cceb080647e174..55bad76d26f02c2383b3a6ef27891e1a43422e9d 100644
>--- a/Source/WebCore/svg/SVGTests.h
>+++ b/Source/WebCore/svg/SVGTests.h
>@@ -35,11 +35,11 @@ class SVGPropertyOwnerRegistry;
> class SVGTests {
>     WTF_MAKE_NONCOPYABLE(SVGTests);
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTests>;
>+
>     static bool hasExtension(const String&);
>     bool isValid() const;
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTests>;
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&);
>     void svgAttributeChanged(const QualifiedName&);
> 
>diff --git a/Source/WebCore/svg/SVGTextContentElement.h b/Source/WebCore/svg/SVGTextContentElement.h
>index 0e6da5c67785cf41657434aa2b95c6fc17e0f0dc..8066c4be4e74abe83ed7efa77de35c3c38d9e3ec 100644
>--- a/Source/WebCore/svg/SVGTextContentElement.h
>+++ b/Source/WebCore/svg/SVGTextContentElement.h
>@@ -28,43 +28,11 @@ namespace WebCore {
> 
> struct DOMPointInit;
> 
>-enum SVGLengthAdjustType {
>-    SVGLengthAdjustUnknown,
>-    SVGLengthAdjustSpacing,
>-    SVGLengthAdjustSpacingAndGlyphs
>-};
>-
>-template<> struct SVGPropertyTraits<SVGLengthAdjustType> {
>-    static unsigned highestEnumValue() { return SVGLengthAdjustSpacingAndGlyphs; }
>-
>-    static String toString(SVGLengthAdjustType type)
>-    {
>-        switch (type) {
>-        case SVGLengthAdjustUnknown:
>-            return emptyString();
>-        case SVGLengthAdjustSpacing:
>-            return "spacing"_s;
>-        case SVGLengthAdjustSpacingAndGlyphs:
>-            return "spacingAndGlyphs"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGLengthAdjustType fromString(const String& value)
>-    {
>-        if (value == "spacingAndGlyphs")
>-            return SVGLengthAdjustSpacingAndGlyphs;
>-        if (value == "spacing")
>-            return SVGLengthAdjustSpacing;
>-        return SVGLengthAdjustUnknown;
>-    }
>-};
>-
> class SVGTextContentElement : public SVGGraphicsElement, public SVGExternalResourcesRequired {
>     WTF_MAKE_ISO_ALLOCATED(SVGTextContentElement);
> public:
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextContentElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>+
>     enum {
>         LENGTHADJUST_UNKNOWN = SVGLengthAdjustUnknown,
>         LENGTHADJUST_SPACING = SVGLengthAdjustSpacing,
>@@ -83,8 +51,6 @@ public:
> 
>     static SVGTextContentElement* elementFromRenderer(RenderObject*);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextContentElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
>-
>     const SVGLengthValue& specifiedTextLength() const { return m_specifiedTextLength; }
>     const SVGLengthValue& textLength() const { return m_textLength->currentValue(); }
>     SVGLengthAdjustType lengthAdjust() const { return m_lengthAdjust->currentValue<SVGLengthAdjustType>(); }
>diff --git a/Source/WebCore/svg/SVGTextElement.h b/Source/WebCore/svg/SVGTextElement.h
>index aa9445d92b6fb4a515916115ef1ad3d855c643d2..8354ca993a0676179551f9e244d153b59c8ce5ff 100644
>--- a/Source/WebCore/svg/SVGTextElement.h
>+++ b/Source/WebCore/svg/SVGTextElement.h
>@@ -26,6 +26,8 @@ namespace WebCore {
> 
> class SVGTextElement final : public SVGTextPositioningElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGTextElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextElement, SVGTextPositioningElement>;
>+
> public:
>     static Ref<SVGTextElement> create(const QualifiedName&, Document&);
> 
>@@ -34,8 +36,11 @@ public:
> private:
>     SVGTextElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>     bool childShouldCreateRenderer(const Node&) const override;
>+    
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGTextPathElement.h b/Source/WebCore/svg/SVGTextPathElement.h
>index 435387bfaf57be437f9da25eba5697c77fba7c9d..805f5bcb021cb67cd505d6b40d6e565d4e4fcd67 100644
>--- a/Source/WebCore/svg/SVGTextPathElement.h
>+++ b/Source/WebCore/svg/SVGTextPathElement.h
>@@ -26,78 +26,10 @@
> 
> namespace WebCore {
> 
>-enum SVGTextPathMethodType {
>-    SVGTextPathMethodUnknown = 0,
>-    SVGTextPathMethodAlign,
>-    SVGTextPathMethodStretch
>-};
>-
>-enum SVGTextPathSpacingType {
>-    SVGTextPathSpacingUnknown = 0,
>-    SVGTextPathSpacingAuto,
>-    SVGTextPathSpacingExact
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGTextPathMethodType> {
>-    static unsigned highestEnumValue() { return SVGTextPathMethodStretch; }
>-
>-    static String toString(SVGTextPathMethodType type)
>-    {
>-        switch (type) {
>-        case SVGTextPathMethodUnknown:
>-            return emptyString();
>-        case SVGTextPathMethodAlign:
>-            return "align"_s;
>-        case SVGTextPathMethodStretch:
>-            return "stretch"_s;
>-        }
>-    
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGTextPathMethodType fromString(const String& value)
>-    {
>-        if (value == "align")
>-            return SVGTextPathMethodAlign;
>-        if (value == "stretch")
>-            return SVGTextPathMethodStretch;
>-        return SVGTextPathMethodUnknown;
>-    }
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGTextPathSpacingType> {
>-    static unsigned highestEnumValue() { return SVGTextPathSpacingExact; }
>-
>-    static String toString(SVGTextPathSpacingType type)
>-    {
>-        switch (type) {
>-        case SVGTextPathSpacingUnknown:
>-            return emptyString();
>-        case SVGTextPathSpacingAuto:
>-            return "auto"_s;
>-        case SVGTextPathSpacingExact:
>-            return "exact"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGTextPathSpacingType fromString(const String& value)
>-    {
>-        if (value == "auto")
>-            return SVGTextPathSpacingAuto;
>-        if (value == "exact")
>-            return SVGTextPathSpacingExact;
>-        return SVGTextPathSpacingUnknown;
>-    }
>-};
>-
> class SVGTextPathElement final : public SVGTextContentElement, public SVGURIReference {
>     WTF_MAKE_ISO_ALLOCATED(SVGTextPathElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextPathElement, SVGTextContentElement, SVGURIReference>;
>+
> public:
>     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
>     enum {
>@@ -126,9 +58,7 @@ private:
>     SVGTextPathElement(const QualifiedName&, Document&);
>     virtual ~SVGTextPathElement();
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextPathElement, SVGTextContentElement, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGTextPositioningElement.h b/Source/WebCore/svg/SVGTextPositioningElement.h
>index a4862ec4762965997430fa84d68d9719b34765ba..61c7db16214f6e59374dbb8253f72af5deaf62fc 100644
>--- a/Source/WebCore/svg/SVGTextPositioningElement.h
>+++ b/Source/WebCore/svg/SVGTextPositioningElement.h
>@@ -27,11 +27,12 @@ namespace WebCore {
> 
> class SVGTextPositioningElement : public SVGTextContentElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGTextPositioningElement);
>-public:
>-    static SVGTextPositioningElement* elementFromRenderer(RenderBoxModelObject&);
> 
>+public:
>     using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextPositioningElement, SVGTextContentElement>;
> 
>+    static SVGTextPositioningElement* elementFromRenderer(RenderBoxModelObject&);
>+
>     const SVGLengthList& x() const { return m_x->currentValue(); }
>     const SVGLengthList& y() const { return m_y->currentValue(); }
>     const SVGLengthList& dx() const { return m_dx->currentValue(); }
>@@ -54,9 +55,6 @@ private:
>     bool isPresentationAttribute(const QualifiedName&) const final;
>     void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
> 
>-    const SVGPropertyRegistry& propertyRegistry() const override { return m_propertyRegistry; }
>-
>-    PropertyRegistry m_propertyRegistry { *this };
>     Ref<SVGAnimatedLengthList> m_x { SVGAnimatedLengthList::create(this, LengthModeWidth) };
>     Ref<SVGAnimatedLengthList> m_y { SVGAnimatedLengthList::create(this, LengthModeHeight) };
>     Ref<SVGAnimatedLengthList> m_dx { SVGAnimatedLengthList::create(this, LengthModeWidth) };
>diff --git a/Source/WebCore/svg/SVGTitleElement.h b/Source/WebCore/svg/SVGTitleElement.h
>index 3f533356707d3e854c44307c340cb8b107c43e8d..9afe40694ca8d9cb1f5cc9abfea77a5009bb661e 100644
>--- a/Source/WebCore/svg/SVGTitleElement.h
>+++ b/Source/WebCore/svg/SVGTitleElement.h
>@@ -27,17 +27,22 @@ namespace WebCore {
> 
> class SVGTitleElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGTitleElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTitleElement, SVGElement>;
>+
> public:
>     static Ref<SVGTitleElement> create(const QualifiedName&, Document&);
> 
> private:
>     SVGTitleElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>+    bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>     InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
>     void removedFromAncestor(RemovalType, ContainerNode&) final;
>     void childrenChanged(const ChildChange&) final;
> 
>-    bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGTransform.h b/Source/WebCore/svg/SVGTransform.h
>index 6a29c72cf3e7f313f709657a4012481c223b8dcd..77b899614fbce38919d73b52bf981ee3f6a8d7e0 100644
>--- a/Source/WebCore/svg/SVGTransform.h
>+++ b/Source/WebCore/svg/SVGTransform.h
>@@ -27,6 +27,7 @@
> 
> #include "SVGMatrix.h"
> #include "SVGTransformValue.h"
>+#include "SVGTransformable.h"
> #include "SVGValueProperty.h"
> 
> namespace WebCore {
>@@ -48,6 +49,19 @@ public:
>         return adoptRef(*new SVGTransform(value.type(), value.matrix()->value(), value.angle(), value.rotationCenter()));
>     }
> 
>+    static Expected<Ref<SVGTransform>, SVGParsingError> create(const UChar*& ptr, const UChar* end)
>+    {
>+        SVGTransformValue::SVGTransformType type = SVGTransformValue::SVG_TRANSFORM_UNKNOWN;
>+        if (!SVGTransformable::parseAndSkipType(ptr, end, type))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        Ref<SVGTransform> transform = SVGTransform::create(type);
>+        if (!SVGTransformable::parseTransformValue(type, ptr, end, transform->value()))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        return transform;
>+    }
>+
>     template<typename T>
>     static ExceptionOr<Ref<SVGTransform>> create(ExceptionOr<T>&& value)
>     {
>@@ -130,6 +144,11 @@ public:
>         return { };
>     }
> 
>+    String valueAsString() const override
>+    {
>+        return m_value.valueAsString();
>+    }
>+
> private:
>     using Base = SVGValueProperty<SVGTransformValue>;
> 
>@@ -147,11 +166,6 @@ private:
>             owner()->commitPropertyChange(this);
>         m_value.matrixDidChange();
>     }
>-
>-    String valueAsString() const override
>-    {
>-        return m_value.valueAsString();
>-    }
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGTransformList.h b/Source/WebCore/svg/SVGTransformList.h
>index 544d60b2e635c1c209934ee435cf4125e6a71f2b..7754b71fb4e961b2e7f06cf71610eb35f4c10240 100644
>--- a/Source/WebCore/svg/SVGTransformList.h
>+++ b/Source/WebCore/svg/SVGTransformList.h
>@@ -22,13 +22,11 @@
> #pragma once
> 
> #include "SVGTransform.h"
>-#include "SVGTransformable.h"
> #include "SVGValuePropertyList.h"
> 
> namespace WebCore {
> 
> class SVGTransformList final : public SVGValuePropertyList<SVGTransform> {
>-    friend class SVGViewSpec;
>     using Base = SVGValuePropertyList<SVGTransform>;
>     using Base::Base;
> 
>@@ -75,16 +73,6 @@ public:
>         return makeRefPtr(item.get());
>     }
> 
>-    void parse(const String& value)
>-    {
>-        clearItems();
>-
>-        auto upconvertedCharacters = StringView(value).upconvertedCharacters();
>-        const UChar* start = upconvertedCharacters;
>-        if (!parse(start, start + value.length()))
>-            clearItems();
>-    }
>-
>     AffineTransform concatenate() const
>     {
>         AffineTransform result;
>@@ -93,44 +81,13 @@ public:
>         return result;
>     }
> 
>-    String valueAsString() const override
>+    SVGParsingError parse(const String& string)
>     {
>-        StringBuilder builder;
>-        for (const auto& transfrom : m_items) {
>-            if (builder.length())
>-                builder.append(' ');
>-
>-            builder.append(transfrom->value().valueAsString());
>-        }
>-        return builder.toString();
>-    }
>-
>-private:
>-    bool parse(const UChar*& start, const UChar* end)
>-    {
>-        bool delimParsed = false;
>-        while (start < end) {
>-            delimParsed = false;
>-            SVGTransformValue::SVGTransformType type = SVGTransformValue::SVG_TRANSFORM_UNKNOWN;
>-            skipOptionalSVGSpaces(start, end);
>-
>-            if (!SVGTransformable::parseAndSkipType(start, end, type))
>-                return false;
>-
>-            Ref<SVGTransform> transform = SVGTransform::create(type);
>-            if (!SVGTransformable::parseTransformValue(type, start, end, transform->value()))
>-                return false;
>-
>-            append(WTFMove(transform));
>-            skipOptionalSVGSpaces(start, end);
>-            if (start < end && *start == ',') {
>-                delimParsed = true;
>-                ++start;
>-            }
>-
>-            skipOptionalSVGSpaces(start, end);
>+        if (auto error = Base::parse(string)) {
>+            clearItems();
>+            return error;
>         }
>-        return !delimParsed;
>+        return NoError;
>     }
> };
> 
>diff --git a/Source/WebCore/svg/SVGURIReference.h b/Source/WebCore/svg/SVGURIReference.h
>index 201b6c71bed7139a9c6e2ed00d62b2df41f6d750..0f98840da27840b62950966972d3a743ddc99508 100644
>--- a/Source/WebCore/svg/SVGURIReference.h
>+++ b/Source/WebCore/svg/SVGURIReference.h
>@@ -32,7 +32,7 @@ class SVGElement;
> class SVGURIReference {
>     WTF_MAKE_NONCOPYABLE(SVGURIReference);
> public:
>-    virtual ~SVGURIReference() = default;
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGURIReference>;
> 
>     void parseAttribute(const QualifiedName&, const AtomicString&);
> 
>@@ -56,13 +56,12 @@ public:
>         return !equalIgnoringFragmentIdentifier(url, document.url());
>     }
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGURIReference>;
>-
>     String href() const { return m_href->currentValue(); }
>     SVGAnimatedString& hrefAnimated() { return m_href; }
> 
> protected:
>     SVGURIReference(SVGElement* contextElement);
>+    virtual ~SVGURIReference() = default;
> 
>     static bool isKnownAttribute(const QualifiedName& attributeName);
> 
>diff --git a/Source/WebCore/svg/SVGUnitTypes.h b/Source/WebCore/svg/SVGUnitTypes.h
>index f44485f7e05df2453faabe69b0c2882fec5004be..4a989c9dc9ba9ef906cb24ddf5312922646b268b 100644
>--- a/Source/WebCore/svg/SVGUnitTypes.h
>+++ b/Source/WebCore/svg/SVGUnitTypes.h
>@@ -19,7 +19,6 @@
> 
> #pragma once
> 
>-#include "SVGPropertyTraits.h"
> #include <wtf/RefCounted.h>
> 
> namespace WebCore {
>@@ -31,38 +30,8 @@ public:
>         SVG_UNIT_TYPE_USERSPACEONUSE        = 1,
>         SVG_UNIT_TYPE_OBJECTBOUNDINGBOX     = 2
>     };
>-
> private:
>-    SVGUnitTypes() { }
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGUnitTypes::SVGUnitType> {
>-    static unsigned highestEnumValue() { return SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX; }
>-
>-    static String toString(SVGUnitTypes::SVGUnitType type)
>-    {
>-        switch (type) {
>-        case SVGUnitTypes::SVG_UNIT_TYPE_UNKNOWN:
>-            return emptyString();
>-        case SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE:
>-            return "userSpaceOnUse"_s;
>-        case SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX:
>-            return "objectBoundingBox"_s;
>-        }
>-
>-        ASSERT_NOT_REACHED();
>-        return emptyString();
>-    }
>-
>-    static SVGUnitTypes::SVGUnitType fromString(const String& value)
>-    {
>-        if (value == "userSpaceOnUse")
>-            return SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE;
>-        if (value == "objectBoundingBox")
>-            return SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
>-        return SVGUnitTypes::SVG_UNIT_TYPE_UNKNOWN;
>-    }
>+    SVGUnitTypes() = default;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGUnknownElement.h b/Source/WebCore/svg/SVGUnknownElement.h
>index a15c7af9787ad21f2ca7c3293c8200682e1babed..964452cc80ab1d8e5f35ff77f7393328a2dce7d1 100644
>--- a/Source/WebCore/svg/SVGUnknownElement.h
>+++ b/Source/WebCore/svg/SVGUnknownElement.h
>@@ -37,6 +37,8 @@ namespace WebCore {
> // false to make sure we don't attempt to render such elements.
> class SVGUnknownElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGUnknownElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGUnknownElement, SVGElement>;
>+
> public:
>     static Ref<SVGUnknownElement> create(const QualifiedName& tagName, Document& document)
>     {
>@@ -49,7 +51,10 @@ private:
>     {
>     }
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+    
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGUseElement.h b/Source/WebCore/svg/SVGUseElement.h
>index 039081d166eada7b5200b604b70e39c4feaa1bdb..9c3963346f6fe690e665b8347b24e6fc64eb4e93 100644
>--- a/Source/WebCore/svg/SVGUseElement.h
>+++ b/Source/WebCore/svg/SVGUseElement.h
>@@ -34,6 +34,8 @@ class SVGGElement;
> 
> class SVGUseElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired, public SVGURIReference, private CachedSVGDocumentClient {
>     WTF_MAKE_ISO_ALLOCATED(SVGUseElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGUseElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>+
> public:
>     static Ref<SVGUseElement> create(const QualifiedName&, Document&);
>     virtual ~SVGUseElement();
>@@ -63,9 +65,7 @@ private:
>     void removedFromAncestor(RemovalType, ContainerNode&) override;
>     void buildPendingResource() override;
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGUseElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     void parseAttribute(const QualifiedName&, const AtomicString&) override;
>     void svgAttributeChanged(const QualifiedName&) override;
> 
>diff --git a/Source/WebCore/svg/SVGVKernElement.h b/Source/WebCore/svg/SVGVKernElement.h
>index 78c8d5501896d16cec707b526ae1d7d02ac0dfa6..1ec072c0c3cd36380ae5ccebd21f8bf135f4fdbe 100644
>--- a/Source/WebCore/svg/SVGVKernElement.h
>+++ b/Source/WebCore/svg/SVGVKernElement.h
>@@ -28,6 +28,8 @@ namespace WebCore {
> 
> class SVGVKernElement final : public SVGElement {
>     WTF_MAKE_ISO_ALLOCATED(SVGVKernElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGVKernElement, SVGElement>;
>+
> public:
>     static Ref<SVGVKernElement> create(const QualifiedName&, Document&);
> 
>@@ -36,7 +38,10 @@ public:
> private:
>     SVGVKernElement(const QualifiedName&, Document&);
> 
>+    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>     bool rendererIsNeeded(const RenderStyle&) final { return false; }
>+
>+    PropertyRegistry m_propertyRegistry { *this };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGViewElement.cpp b/Source/WebCore/svg/SVGViewElement.cpp
>index 3396c6e98236b64e8695ff0419e80269577b473a..0aec3276ec4adc0b21a62f74fb5379a85397bb2a 100644
>--- a/Source/WebCore/svg/SVGViewElement.cpp
>+++ b/Source/WebCore/svg/SVGViewElement.cpp
>@@ -51,7 +51,7 @@ Ref<SVGViewElement> SVGViewElement::create(const QualifiedName& tagName, Documen
> void SVGViewElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
> {
>     if (name == SVGNames::viewTargetAttr) {
>-        m_viewTarget->reset(value);
>+        m_viewTarget->parse(value);
>         return;
>     }
> 
>diff --git a/Source/WebCore/svg/SVGViewElement.h b/Source/WebCore/svg/SVGViewElement.h
>index b0eef19d7c495051878a8815ae462da95084e07c..75d182f4d8528d4de5f9eee42b623e5057ec4350 100644
>--- a/Source/WebCore/svg/SVGViewElement.h
>+++ b/Source/WebCore/svg/SVGViewElement.h
>@@ -31,6 +31,8 @@ namespace WebCore {
> 
> class SVGViewElement final : public SVGElement, public SVGExternalResourcesRequired, public SVGFitToViewBox, public SVGZoomAndPan {
>     WTF_MAKE_ISO_ALLOCATED(SVGViewElement);
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGViewElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>+
> public:
>     static Ref<SVGViewElement> create(const QualifiedName&, Document&);
> 
>@@ -42,9 +44,7 @@ public:
> private:
>     SVGViewElement(const QualifiedName&, Document&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGViewElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
>     const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
>-
>     // FIXME(webkit.org/b/196554): svgAttributeChanged missing.
>     void parseAttribute(const QualifiedName&, const AtomicString&) final;
> 
>diff --git a/Source/WebCore/svg/SVGViewSpec.cpp b/Source/WebCore/svg/SVGViewSpec.cpp
>index 8f423516b5bdbc5287cda44adf49fc618ddc32ec..78b89c5980c1bf964d9e1daf791a81ccf2bb03a3 100644
>--- a/Source/WebCore/svg/SVGViewSpec.cpp
>+++ b/Source/WebCore/svg/SVGViewSpec.cpp
>@@ -23,11 +23,8 @@
> 
> #include "Document.h"
> #include "SVGElement.h"
>-#include "SVGFitToViewBox.h"
> #include "SVGNames.h"
>-#include "SVGParserUtilities.h"
> #include "SVGTransformList.h"
>-#include "SVGTransformable.h"
> 
> namespace WebCore {
> 
>@@ -60,99 +57,104 @@ void SVGViewSpec::reset()
>     SVGZoomAndPan::reset();
> }
> 
>-static const UChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'};
>-static const UChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
>-static const UChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
>-static const UChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
>-static const UChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
>-static const UChar viewTargetSpec[] =  {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
>+static Optional<Vector<std::pair<String, String>>> parseNamesValues(const String& string)
>+{
>+    Vector<std::pair<String, String>> result;
>+
>+    for (size_t position = 0; position < string.length(); ) {
>+        size_t start = position;
>+        
>+        // Find of the end of the attributue name.
>+        position = string.find('(', start);
>+        if (position == notFound)
>+            return WTF::nullopt;
>+
>+        // Extract the name and stip the white spaces.
>+        String name = string.substring(start, position - start).stripWhiteSpace();
>+
>+        // Keep track of opend left parentheses but store the postions of the closed ones
>+        Vector<size_t> leftParentheses { position };
>+        Vector<std::pair<size_t, size_t>> parentheses;
>+        start = position++;
>+
>+        while (position < string.length() && !leftParentheses.isEmpty()) {
>+            if (string[position] == '(')
>+                leftParentheses.append(position);
>+            else if (string[position] == ')')
>+                parentheses.append(std::make_pair(leftParentheses.takeLast(), position));
>+            ++position;
>+        }
>+
>+        // Unbalanced parentheses.
>+        if (!leftParentheses.isEmpty())
>+            return WTF::nullopt;
> 
>-bool SVGViewSpec::parseViewSpec(const String& viewSpec)
>+        size_t end = position;
>+        
>+        // Remove unnecessary parentheses.
>+        for (; !parentheses.isEmpty(); ++start, --end) {
>+            auto pair = parentheses.takeLast();
>+            if (pair.first != start || pair.second != end -1)
>+                break;
>+        }
>+
>+        // Extract the value and stip the white spaces.
>+        String value = string.substring(start, end - start).stripWhiteSpace();
>+        result.append(std::make_pair(name, value));
>+
>+        // Skip the semicolon if it separates the attributes.
>+        if (position < string.length() && string[position] == ';')
>+            ++position;
>+    }
>+
>+    return result;
>+}
>+
>+SVGParsingError SVGViewSpec::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+{
>+    if (name == SVGNames::transformAttr)
>+        return m_transform->parse(value);
>+
>+    if (auto error = SVGFitToViewBox::parseAttribute(name, value))
>+        return *error;
>+
>+    if (auto error = SVGZoomAndPan::parseAttribute(name, value))
>+        return *error;
>+
>+    return ParsingAttributeFailedError;
>+}
>+
>+SVGParsingError SVGViewSpec::parseViewSpec(const String& viewSpec)
> {
>-    auto upconvertedCharacters = StringView(viewSpec).upconvertedCharacters();
>-    const UChar* currViewSpec = upconvertedCharacters;
>-    const UChar* end = currViewSpec + viewSpec.length();
>-
>-    if (currViewSpec >= end || !m_contextElement)
>-        return false;
>-
>-    if (!skipString(currViewSpec, end, svgViewSpec, WTF_ARRAY_LENGTH(svgViewSpec)))
>-        return false;
>-
>-    if (currViewSpec >= end || *currViewSpec != '(')
>-        return false;
>-    currViewSpec++;
>-
>-    while (currViewSpec < end && *currViewSpec != ')') {
>-        if (*currViewSpec == 'v') {
>-            if (skipString(currViewSpec, end, viewBoxSpec, WTF_ARRAY_LENGTH(viewBoxSpec))) {
>-                if (currViewSpec >= end || *currViewSpec != '(')
>-                    return false;
>-                currViewSpec++;
>-                FloatRect viewBox;
>-                if (!SVGFitToViewBox::parseViewBox(currViewSpec, end, viewBox, false))
>-                    return false;
>-                setViewBox(viewBox);
>-                if (currViewSpec >= end || *currViewSpec != ')')
>-                    return false;
>-                currViewSpec++;
>-            } else if (skipString(currViewSpec, end, viewTargetSpec, WTF_ARRAY_LENGTH(viewTargetSpec))) {
>-                if (currViewSpec >= end || *currViewSpec != '(')
>-                    return false;
>-                const UChar* viewTargetStart = ++currViewSpec;
>-                while (currViewSpec < end && *currViewSpec != ')')
>-                    currViewSpec++;
>-                if (currViewSpec >= end)
>-                    return false;
>-                m_viewTargetString = String(viewTargetStart, currViewSpec - viewTargetStart);
>-                currViewSpec++;
>-            } else
>-                return false;
>-        } else if (*currViewSpec == 'z') {
>-            if (!skipString(currViewSpec, end, zoomAndPanSpec, WTF_ARRAY_LENGTH(zoomAndPanSpec)))
>-                return false;
>-            if (currViewSpec >= end || *currViewSpec != '(')
>-                return false;
>-            currViewSpec++;
>-            if (!SVGZoomAndPan::parseZoomAndPan(currViewSpec, end))
>-                return false;
>-            if (currViewSpec >= end || *currViewSpec != ')')
>-                return false;
>-            currViewSpec++;
>-        } else if (*currViewSpec == 'p') {
>-            if (!skipString(currViewSpec, end, preserveAspectRatioSpec, WTF_ARRAY_LENGTH(preserveAspectRatioSpec)))
>-                return false;
>-            if (currViewSpec >= end || *currViewSpec != '(')
>-                return false;
>-            currViewSpec++;
>-            SVGPreserveAspectRatioValue preserveAspectRatio;
>-            if (!preserveAspectRatio.parse(currViewSpec, end, false))
>-                return false;
>-            setPreserveAspectRatio(preserveAspectRatio);
>-            if (currViewSpec >= end || *currViewSpec != ')')
>-                return false;
>-            currViewSpec++;
>-        } else if (*currViewSpec == 't') {
>-            if (!skipString(currViewSpec, end, transformSpec, WTF_ARRAY_LENGTH(transformSpec)))
>-                return false;
>-            if (currViewSpec >= end || *currViewSpec != '(')
>-                return false;
>-            currViewSpec++;
>-            m_transform->parse(currViewSpec, end);
>-            if (currViewSpec >= end || *currViewSpec != ')')
>-                return false;
>-            currViewSpec++;
>-        } else
>-            return false;
>-
>-        if (currViewSpec < end && *currViewSpec == ';')
>-            currViewSpec++;
>+    auto result = parseNamesValues(viewSpec);
>+    if (!result || result->size() != 1 || (*result)[0].first != "svgView")
>+        return ParsingAttributeFailedError;
>+
>+    auto namesValues = parseNamesValues((*result)[0].second);
>+    if (!namesValues || namesValues->isEmpty())
>+        return ParsingAttributeFailedError;
>+
>+    StringBuilder transfrom;
>+    for (auto& nameValue : *namesValues) {
>+        QualifiedName name(emptyAtom(), nameValue.first, emptyAtom());
>+        if (name.matches(SVGNames::viewTargetAttr)) {
>+            // viewTarget can't be an empty string.
>+            if (nameValue.second.isEmpty())
>+                return UnexpectedEndOfAttributeError;
>+            m_viewTargetString = nameValue.second;
>+        } else if (name.matches(SVGNames::transformAttr)) {
>+            // transform can exist multiple times. Collect values and parse at the end.
>+            if (transfrom.length())
>+                transfrom.append(' ');
>+            transfrom.append(nameValue.second);
>+        } else if (auto error = parseAttribute(name, nameValue.second))
>+            return error;
>     }
>-    
>-    if (currViewSpec >= end || *currViewSpec != ')')
>-        return false;
> 
>-    return true;
>+    if (transfrom.length())
>+        return parseAttribute(SVGNames::transformAttr, transfrom.toString());
>+
>+    return NoError;
> }
> 
> }
>diff --git a/Source/WebCore/svg/SVGViewSpec.h b/Source/WebCore/svg/SVGViewSpec.h
>index 2e7ef9786c1a886fd25acfea037fc850d79de520..6f88c0caf929d417a032cf553299f1e6c6a09610 100644
>--- a/Source/WebCore/svg/SVGViewSpec.h
>+++ b/Source/WebCore/svg/SVGViewSpec.h
>@@ -30,13 +30,15 @@ class SVGElement;
> class SVGTransformList;
> 
> class SVGViewSpec final : public RefCounted<SVGViewSpec>, public SVGFitToViewBox, public SVGZoomAndPan {
>+    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGViewSpec, SVGFitToViewBox>;
>+
> public:
>     static Ref<SVGViewSpec> create(SVGElement& contextElement)
>     {
>         return adoptRef(*new SVGViewSpec(contextElement));
>     }
> 
>-    bool parseViewSpec(const String&);
>+    SVGParsingError parseViewSpec(const String&);
>     void reset();
>     void resetContextElement() { m_contextElement = nullptr; }
> 
>@@ -51,7 +53,7 @@ public:
> private:
>     explicit SVGViewSpec(SVGElement&);
> 
>-    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGViewSpec, SVGFitToViewBox>;
>+    SVGParsingError parseAttribute(const QualifiedName&, const AtomicString&);
> 
>     WeakPtr<SVGElement> m_contextElement;
>     String m_viewTargetString;
>diff --git a/Source/WebCore/svg/SVGZoomAndPan.cpp b/Source/WebCore/svg/SVGZoomAndPan.cpp
>index 14d8fcb77ea5801d65109f453da250362311276d..9a0e02313e89866c7bdfbcad63c2a04fa307c049 100644
>--- a/Source/WebCore/svg/SVGZoomAndPan.cpp
>+++ b/Source/WebCore/svg/SVGZoomAndPan.cpp
>@@ -24,28 +24,17 @@
> 
> namespace WebCore {
> 
>-bool SVGZoomAndPan::parseZoomAndPan(const UChar*& start, const UChar* end)
>+Optional<SVGParsingError> SVGZoomAndPan::parseAttribute(const QualifiedName& name, const AtomicString& value)
> {
>-    static const UChar disable[] = { 'd', 'i', 's', 'a', 'b', 'l', 'e' };
>-    if (skipString(start, end, disable, WTF_ARRAY_LENGTH(disable))) {
>-        m_zoomAndPan = SVGZoomAndPanDisable;
>-        return true;
>-    }
>+    if (!name.matches(SVGNames::zoomAndPanAttr))
>+        return WTF::nullopt;
> 
>-    static const UChar magnify[] = { 'm', 'a', 'g', 'n', 'i', 'f', 'y' };
>-    if (skipString(start, end, magnify, WTF_ARRAY_LENGTH(magnify))) {
>-        m_zoomAndPan = SVGZoomAndPanMagnify;
>-        return true;
>-    }
>-
>-    return false;
>-}
>-
>-void SVGZoomAndPan::parseAttribute(const QualifiedName& attributeName, const AtomicString& value)
>-{
>-    if (attributeName != SVGNames::zoomAndPanAttr)
>-        return;
>-    m_zoomAndPan = SVGPropertyTraits<SVGZoomAndPanType>::fromString(value);
>+    auto expectedZoomAndPan = SVGPropertyTraits<SVGZoomAndPanType>::parse(value);
>+    if (!expectedZoomAndPan)
>+        return expectedZoomAndPan.error();
>+    
>+    m_zoomAndPan = *expectedZoomAndPan;
>+    return NoError;
> }
> 
> }
>diff --git a/Source/WebCore/svg/SVGZoomAndPan.h b/Source/WebCore/svg/SVGZoomAndPan.h
>index 9fbcfb09ac3ad016b8fe2d292dab23562a5254a7..90638f9108bc95ba69067e7a7e25b0c898da6c1d 100644
>--- a/Source/WebCore/svg/SVGZoomAndPan.h
>+++ b/Source/WebCore/svg/SVGZoomAndPan.h
>@@ -23,8 +23,8 @@
> 
> #include "ExceptionOr.h"
> #include "QualifiedName.h"
>+#include "SVGEnumType.h"
> #include "SVGNames.h"
>-#include "SVGZoomAndPanType.h"
> 
> namespace WebCore {
> 
>@@ -41,17 +41,15 @@ public:
>     SVGZoomAndPanType zoomAndPan() const { return m_zoomAndPan; }
>     void setZoomAndPan(SVGZoomAndPanType zoomAndPan) { m_zoomAndPan = zoomAndPan; }
>     ExceptionOr<void> setZoomAndPan(unsigned) { return Exception { NoModificationAllowedError }; }
>-    void reset() { m_zoomAndPan = SVGPropertyTraits<SVGZoomAndPanType>::initialValue(); }
>+    void reset() { m_zoomAndPan = SVGZoomAndPanMagnify; }
> 
>-    void parseAttribute(const QualifiedName&, const AtomicString&);
>+    Optional<SVGParsingError> parseAttribute(const QualifiedName&, const AtomicString&);
> 
> protected:
>     SVGZoomAndPan() = default;
> 
>-    bool parseZoomAndPan(const UChar*&, const UChar*);
>-
> private:
>-    SVGZoomAndPanType m_zoomAndPan { SVGPropertyTraits<SVGZoomAndPanType>::initialValue() };
>+    SVGZoomAndPanType m_zoomAndPan { SVGZoomAndPanMagnify };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGZoomAndPanType.h b/Source/WebCore/svg/SVGZoomAndPanType.h
>deleted file mode 100644
>index 120fa93f63766d327015ae61916970e5c86af66a..0000000000000000000000000000000000000000
>--- a/Source/WebCore/svg/SVGZoomAndPanType.h
>+++ /dev/null
>@@ -1,52 +0,0 @@
>-/*
>- * Copyright (C) 2018 Apple Inc.  All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- * 1. Redistributions of source code must retain the above copyright
>- *    notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- *    notice, this list of conditions and the following disclaimer in the
>- *    documentation and/or other materials provided with the distribution.
>- *
>- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#pragma once
>-
>-#include "SVGPropertyTraits.h"
>-
>-namespace WebCore {
>-
>-enum SVGZoomAndPanType {
>-    SVGZoomAndPanUnknown,
>-    SVGZoomAndPanDisable,
>-    SVGZoomAndPanMagnify
>-};
>-
>-template<>
>-struct SVGPropertyTraits<SVGZoomAndPanType> {
>-    static SVGZoomAndPanType initialValue() { return SVGZoomAndPanMagnify; }
>-    static String toString(SVGZoomAndPanType) { return emptyString(); }
>-    static SVGZoomAndPanType fromString(const String& value)
>-    {
>-        if (value == "disable")
>-            return SVGZoomAndPanDisable;
>-        if (value == "magnify")
>-            return SVGZoomAndPanMagnify;
>-        return SVGZoomAndPanUnknown;
>-    }
>-};
>-
>-}
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedDecoratedProperty.h b/Source/WebCore/svg/properties/SVGAnimatedDecoratedProperty.h
>index e5efaaea7111bc6c957d972d74548de92d8a133e..badfb9ea4ff00816758bc1494ffd332ff36c646c 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedDecoratedProperty.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedDecoratedProperty.h
>@@ -97,8 +97,8 @@ public:
>     }
> 
>     // Managing the relationship with the owner.
>-    void setDirty() override { m_state = SVGPropertyState::Dirty; }
>-    bool isDirty() const override { return m_state == SVGPropertyState::Dirty; }
>+    SVGPropertyState state() const override { return m_state; }
>+    void setState(SVGPropertyState state) override { m_state = state; }
>     Optional<String> synchronize() override
>     {
>         if (m_state == SVGPropertyState::Clean)
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedPrimitiveProperty.h b/Source/WebCore/svg/properties/SVGAnimatedPrimitiveProperty.h
>index c425619200df0485671bc7319eb57f6d3ca8ad8d..a02ea27a54b5d6674a4ab231d4d67b98c6380649 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedPrimitiveProperty.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedPrimitiveProperty.h
>@@ -87,8 +87,8 @@ public:
>     }
> 
>     // Managing the relationship with the owner.
>-    void setDirty() override { m_state = SVGPropertyState::Dirty; }
>-    bool isDirty() const override { return m_state == SVGPropertyState::Dirty; }
>+    SVGPropertyState state() const override { return m_state; }
>+    void setState(SVGPropertyState state) override { m_state = state; }
>     Optional<String> synchronize() override
>     {
>         if (m_state == SVGPropertyState::Clean)
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedProperty.h b/Source/WebCore/svg/properties/SVGAnimatedProperty.h
>index c6f932e6df69ccefafc965e32cd56620a1fc3364..8a9e9138d0e6e55bc594e46637ab8fe18bfe240d 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedProperty.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedProperty.h
>@@ -45,10 +45,10 @@ public:
>     
>     virtual String baseValAsString() const { return emptyString(); }
>     virtual String animValAsString() const { return emptyString(); }
>-    
>+
>     // Control the synchronization between the attribute and its reflection in baseVal.
>-    virtual bool isDirty() const { return false; }
>-    virtual void setDirty() { }
>+    virtual SVGPropertyState state() const { return SVGPropertyState::Clean; }
>+    virtual void setState(SVGPropertyState) { }
>     virtual Optional<String> synchronize() { return WTF::nullopt; }
>     
>     // Control the animation life cycle.
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedPropertyList.h b/Source/WebCore/svg/properties/SVGAnimatedPropertyList.h
>index f4255d7f6e75b14aca88a880bff36e656383f716..077c837df864c04025bcd3bfd4ee843a4229828c 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedPropertyList.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedPropertyList.h
>@@ -68,8 +68,8 @@ public:
>     }
> 
>     // Managing the relationship with the owner.
>-    void setDirty() override { m_baseVal->setDirty(); }
>-    bool isDirty() const override { return m_baseVal->isDirty(); }
>+    SVGPropertyState state() const override { return m_baseVal->state(); }
>+    void setState(SVGPropertyState state) override { m_baseVal->setState(state); }
>     Optional<String> synchronize() override { return m_baseVal->synchronize(); }
> 
>     // Used by RenderSVGElements and DumpRenderTree.
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedPropertyPairAccessorImpl.h b/Source/WebCore/svg/properties/SVGAnimatedPropertyPairAccessorImpl.h
>index d47e4ae5579006d25ba094595b3f6716e1758e74..297f0efc4cdb8ee85c0010d41d29c7a615fe0c7e 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedPropertyPairAccessorImpl.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedPropertyPairAccessorImpl.h
>@@ -48,8 +48,8 @@ public:
> private:
>     Optional<String> synchronize(const OwnerType& owner) const final
>     {
>-        bool dirty1 = property1(owner)->isDirty();
>-        bool dirty2 = property2(owner)->isDirty();
>+        bool dirty1 = property1(owner)->state() == SVGPropertyState::Dirty;
>+        bool dirty2 = property2(owner)->state() == SVGPropertyState::Dirty;
>         if (!(dirty1 || dirty2))
>             return WTF::nullopt;
> 
>@@ -85,8 +85,8 @@ public:
> private:
>     Optional<String> synchronize(const OwnerType& owner) const final
>     {
>-        bool dirty1 = property1(owner)->isDirty();
>-        bool dirty2 = property2(owner)->isDirty();
>+        bool dirty1 = property1(owner)->state() == SVGPropertyState::Dirty;
>+        bool dirty2 = property2(owner)->state() == SVGPropertyState::Dirty;
>         if (!(dirty1 || dirty2))
>             return WTF::nullopt;
> 
>@@ -120,8 +120,8 @@ public:
> private:
>     Optional<String> synchronize(const OwnerType& owner) const final
>     {
>-        bool dirty1 = property1(owner)->isDirty();
>-        bool dirty2 = property2(owner)->isDirty();
>+        bool dirty1 = property1(owner)->state() == SVGPropertyState::Dirty;
>+        bool dirty2 = property2(owner)->state() == SVGPropertyState::Dirty;
>         if (!(dirty1 || dirty2))
>             return WTF::nullopt;
> 
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedValueProperty.h b/Source/WebCore/svg/properties/SVGAnimatedValueProperty.h
>index dfdb171a0cb83fc7596059e7604a7fd89351f525..6127340c47cda94fa8e980d59b2ba4a900b423aa 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedValueProperty.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedValueProperty.h
>@@ -84,8 +84,8 @@ public:
>     }
> 
>     // Managing the relationship with the owner.
>-    void setDirty() override { m_baseVal->setDirty(); }
>-    bool isDirty() const override { return m_baseVal->isDirty(); }
>+    SVGPropertyState state() const override { return m_baseVal->state(); }
>+    void setState(SVGPropertyState state) override { m_baseVal->setState(state); }
>     Optional<String> synchronize() override { return m_baseVal->synchronize(); }
> 
>     // Used by RenderSVGElements and DumpRenderTree.
>@@ -142,6 +142,12 @@ protected:
>     {
>     }
> 
>+    SVGAnimatedValueProperty(SVGElement* contextElement, SVGPropertyAccess access, SVGPropertyState state)
>+        : SVGAnimatedProperty(contextElement)
>+        , m_baseVal(PropertyType::create(this, access, state))
>+    {
>+    }
>+
>     RefPtr<PropertyType>& ensureAnimVal()
>     {
>         if (!m_animVal)
>diff --git a/Source/WebCore/svg/properties/SVGDecoratedEnumeration.h b/Source/WebCore/svg/properties/SVGDecoratedEnumeration.h
>index 264c36b69074ccf3e2e29d267721cf5374570311..106bcde455bc748f52d62cb631cd3c42cfadb748 100644
>--- a/Source/WebCore/svg/properties/SVGDecoratedEnumeration.h
>+++ b/Source/WebCore/svg/properties/SVGDecoratedEnumeration.h
>@@ -26,6 +26,7 @@
> #pragma once
> 
> #include "SVGDecoratedPrimitive.h"
>+#include "SVGEnumTraits.h"
> 
> namespace WebCore {
> 
>@@ -45,7 +46,7 @@ public:
> private:
>     bool setValue(const DecorationType& value) override
>     {
>-        if (!value || value > SVGIDLEnumLimits<EnumType>::highestExposedEnumValue())
>+        if (!SVGPropertyTraits<EnumType>::isValidEnum(value))
>             return false;
>         Base::setValueInternal(value);
>         return true;
>@@ -53,7 +54,7 @@ private:
> 
>     DecorationType value() const override
>     {
>-        if (Base::value() > SVGIDLEnumLimits<EnumType>::highestExposedEnumValue())
>+        if (!SVGPropertyTraits<EnumType>::isValidEnum(Base::value()))
>             return m_outOfRangeEnumValue;
>         return Base::value();
>     }
>diff --git a/Source/WebCore/svg/properties/SVGDecoratedPrimitive.h b/Source/WebCore/svg/properties/SVGDecoratedPrimitive.h
>index e2a5243124f073f85ad8dd6a96df4a65350b67c8..fd243a17d2b6f32055aa69e26120479dd889a950 100644
>--- a/Source/WebCore/svg/properties/SVGDecoratedPrimitive.h
>+++ b/Source/WebCore/svg/properties/SVGDecoratedPrimitive.h
>@@ -26,6 +26,7 @@
> #pragma once
> 
> #include "SVGDecoratedProperty.h"
>+#include "SVGEnumTypeTraits.h"
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/svg/properties/SVGEnumTraits.h b/Source/WebCore/svg/properties/SVGEnumTraits.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9cb346491996b4b03a0ff8881979876b02206b49
>--- /dev/null
>+++ b/Source/WebCore/svg/properties/SVGEnumTraits.h
>@@ -0,0 +1,75 @@
>+/*
>+ * Copyright (C) 2019 Apple Inc.  All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#include "SVGParsingError.h"
>+#include "SVGPropertyTraits.h"
>+#include <wtf/Expected.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+template<typename> struct SVGEnumTraits;
>+
>+template<typename EnumType> using SVGEnumValue = std::pair<EnumType, String>;
>+
>+template<typename EnumType> using SVGEnumValues = Vector<SVGEnumValue<EnumType>>;
>+
>+template<typename EnumType>
>+struct SVGPropertyTraits<EnumType, std::enable_if_t<std::is_enum<EnumType>::value>> {
>+    template<typename T>
>+    static constexpr bool isValidEnum(T t)
>+    {
>+        static_assert(sizeof(T) >= std::underlying_type_t<EnumType>(), "Integral type must be at least the size of the underlying enum type");
>+    
>+        if (t > static_cast<T>(SVGEnumTraits<EnumType>::highestExposedEnumValue()))
>+            return false;
>+        return SVGEnumTraits<EnumType>::values().findMatching([&](auto& item) {
>+            return static_cast<T>(item.first) == t;
>+        }) != notFound;
>+    }
>+
>+    static constexpr Expected<EnumType, SVGParsingError> parse(const String& string)
>+    {
>+        auto find = SVGEnumTraits<EnumType>::values().findMatching([&](auto& item) {
>+            return item.second == string;
>+        });
>+        if (find != notFound)
>+            return SVGEnumTraits<EnumType>::values()[find].first;
>+        return makeUnexpected(UnrecognizedEnumValueError);
>+    }
>+    static constexpr EnumType fromString(const String& string) { return parse(string).value_or(0); }
>+
>+    static String toString(EnumType value)
>+    {
>+        auto find = SVGEnumTraits<EnumType>::values().findMatching([&](auto& item) {
>+            return item.first == value;
>+        });
>+        return find != notFound ? SVGEnumTraits<EnumType>::values()[find].second : emptyString();
>+    }
>+};
>+
>+}
>diff --git a/Source/WebCore/svg/properties/SVGEnumType.h b/Source/WebCore/svg/properties/SVGEnumType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e6187a38774755db188096e4d854450a1a2ee4dd
>--- /dev/null
>+++ b/Source/WebCore/svg/properties/SVGEnumType.h
>@@ -0,0 +1,80 @@
>+/*
>+ * Copyright (C) 2019 Apple Inc.  All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum SVGLengthAdjustType {
>+    SVGLengthAdjustUnknown,
>+    SVGLengthAdjustSpacing,
>+    SVGLengthAdjustSpacingAndGlyphs
>+};
>+
>+enum SVGMarkerUnitsType {
>+    SVGMarkerUnitsUnknown = 0,
>+    SVGMarkerUnitsUserSpaceOnUse,
>+    SVGMarkerUnitsStrokeWidth
>+};
>+
>+enum SVGMarkerOrientType {
>+    SVGMarkerOrientUnknown = 0,
>+    SVGMarkerOrientAuto,
>+    SVGMarkerOrientAngle,
>+    SVGMarkerOrientAutoStartReverse
>+};
>+
>+enum SVGSpreadMethodType {
>+    SVGSpreadMethodUnknown = 0,
>+    SVGSpreadMethodPad,
>+    SVGSpreadMethodReflect,
>+    SVGSpreadMethodRepeat
>+};
>+
>+enum SVGStitchOptions {
>+    SVGStitchTypeUnknown  = 0,
>+    SVGStitchTypeStitch,
>+    SVGStitchTypeNoStitch
>+};
>+
>+enum SVGTextPathMethodType {
>+    SVGTextPathMethodUnknown = 0,
>+    SVGTextPathMethodAlign,
>+    SVGTextPathMethodStretch
>+};
>+
>+enum SVGTextPathSpacingType {
>+    SVGTextPathSpacingUnknown = 0,
>+    SVGTextPathSpacingAuto,
>+    SVGTextPathSpacingExact
>+};
>+
>+enum SVGZoomAndPanType {
>+    SVGZoomAndPanUnknown = 0,
>+    SVGZoomAndPanDisable,
>+    SVGZoomAndPanMagnify
>+};
>+
>+};
>diff --git a/Source/WebCore/svg/properties/SVGEnumTypeTraits.h b/Source/WebCore/svg/properties/SVGEnumTypeTraits.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..315f9556fa00f17e9081c2202322c7ca5f22e3a9
>--- /dev/null
>+++ b/Source/WebCore/svg/properties/SVGEnumTypeTraits.h
>@@ -0,0 +1,274 @@
>+/*
>+ * Copyright (C) 2019 Apple Inc.  All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#include "FEColorMatrix.h"
>+#include "FEComponentTransfer.h"
>+#include "FEComposite.h"
>+#include "FEConvolveMatrix.h"
>+#include "FEDisplacementMap.h"
>+#include "FEMorphology.h"
>+#include "FETurbulence.h"
>+#include "SVGEnumTraits.h"
>+#include "SVGEnumType.h"
>+#include "SVGUnitTypes.h"
>+
>+namespace WebCore {
>+
>+template<> struct SVGEnumTraits<BlendMode> {
>+    static const SVGEnumValues<BlendMode>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<BlendMode>> values(std::initializer_list<SVGEnumValue<BlendMode>> {
>+            { BlendMode::Normal,     "normal"_s },
>+            { BlendMode::Multiply,   "multiply"_s },
>+            { BlendMode::Screen,     "screen"_s },
>+            { BlendMode::Darken,     "darken"_s },
>+            { BlendMode::Lighten,    "lighten"_s },
>+            { BlendMode::Overlay,    "overlay"_s },
>+            { BlendMode::ColorDodge, "color-dodge"_s },
>+            { BlendMode::ColorBurn,  "color-burn"_s },
>+            { BlendMode::HardLight,  "hard-light"_s },
>+            { BlendMode::SoftLight,  "soft-light"_s },
>+            { BlendMode::Difference, "difference"_s },
>+            { BlendMode::Exclusion,  "exclusion"_s },
>+            { BlendMode::Hue,        "hue"_s },
>+            { BlendMode::Saturation, "saturation"_s },
>+            { BlendMode::Color,      "color"_s },
>+            { BlendMode::Luminosity, "luminosity"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return BlendMode::Luminosity; }
>+};
>+
>+template<> struct SVGEnumTraits<ChannelSelectorType> {
>+    static const SVGEnumValues<ChannelSelectorType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<ChannelSelectorType>> values(std::initializer_list<SVGEnumValue<ChannelSelectorType>> {
>+            { CHANNEL_R,       "R"_s },
>+            { CHANNEL_G,       "G"_s },
>+            { CHANNEL_B,       "B"_s },
>+            { CHANNEL_A,       "A"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return CHANNEL_A; }
>+};
>+
>+template<> struct SVGEnumTraits<ComponentTransferType> {
>+    static const SVGEnumValues<ComponentTransferType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<ComponentTransferType>> values(std::initializer_list<SVGEnumValue<ComponentTransferType>> {
>+            { FECOMPONENTTRANSFER_TYPE_IDENTITY, "identity"_s },
>+            { FECOMPONENTTRANSFER_TYPE_TABLE,    "table"_s },
>+            { FECOMPONENTTRANSFER_TYPE_DISCRETE, "discrete"_s },
>+            { FECOMPONENTTRANSFER_TYPE_LINEAR,   "linear"_s },
>+            { FECOMPONENTTRANSFER_TYPE_GAMMA,    "gamma"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return FECOMPONENTTRANSFER_TYPE_GAMMA; }
>+};
>+
>+template<> struct SVGEnumTraits<ColorMatrixType> {
>+    static const SVGEnumValues<ColorMatrixType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<ColorMatrixType>> values(std::initializer_list<SVGEnumValue<ColorMatrixType>> {
>+            { FECOLORMATRIX_TYPE_MATRIX,           "matrix"_s },
>+            { FECOLORMATRIX_TYPE_SATURATE,         "saturate"_s },
>+            { FECOLORMATRIX_TYPE_HUEROTATE,        "hueRotate"_s },
>+            { FECOLORMATRIX_TYPE_LUMINANCETOALPHA, "luminanceToAlpha"_s },
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return FECOLORMATRIX_TYPE_LUMINANCETOALPHA; }
>+};
>+
>+template<> struct SVGEnumTraits<CompositeOperationType> {
>+    static const SVGEnumValues<CompositeOperationType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<CompositeOperationType>> values(std::initializer_list<SVGEnumValue<CompositeOperationType>> {
>+            { FECOMPOSITE_OPERATOR_OVER,       "over"_s },
>+            { FECOMPOSITE_OPERATOR_IN,         "in"_s },
>+            { FECOMPOSITE_OPERATOR_OUT,        "out"_s },
>+            { FECOMPOSITE_OPERATOR_ATOP,       "atop"_s },
>+            { FECOMPOSITE_OPERATOR_XOR,        "xor"_s },
>+            { FECOMPOSITE_OPERATOR_ARITHMETIC, "arithmetic"_s },
>+            { FECOMPOSITE_OPERATOR_LIGHTER,    "lighter"_s },
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return FECOMPOSITE_OPERATOR_ARITHMETIC; }
>+};
>+
>+template<> struct SVGEnumTraits<EdgeModeType> {
>+    static const SVGEnumValues<EdgeModeType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<EdgeModeType>> values(std::initializer_list<SVGEnumValue<EdgeModeType>> {
>+            { EDGEMODE_DUPLICATE, "duplicate"_s },
>+            { EDGEMODE_WRAP,      "wrap"_s },
>+            { EDGEMODE_NONE,      "none"_s },
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return EDGEMODE_NONE; }
>+};
>+
>+template<> struct SVGEnumTraits<MorphologyOperatorType> {
>+    static const SVGEnumValues<MorphologyOperatorType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<MorphologyOperatorType>> values(std::initializer_list<SVGEnumValue<MorphologyOperatorType>> {
>+            { FEMORPHOLOGY_OPERATOR_ERODE,   "erode"_s },
>+            { FEMORPHOLOGY_OPERATOR_DILATE,  "dilate"_s },
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return FEMORPHOLOGY_OPERATOR_DILATE; }
>+};
>+
>+template<> struct SVGEnumTraits<TurbulenceType> {
>+    static const SVGEnumValues<TurbulenceType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<TurbulenceType>> values(std::initializer_list<SVGEnumValue<TurbulenceType>> {
>+            { TurbulenceType::FractalNoise, "fractalNoise"_s },
>+            { TurbulenceType::Turbulence,   "turbulence"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return TurbulenceType::Turbulence; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGLengthAdjustType> {
>+    static const SVGEnumValues<SVGLengthAdjustType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGLengthAdjustType>> values(std::initializer_list<SVGEnumValue<SVGLengthAdjustType>> {
>+            { SVGLengthAdjustSpacing,          "spacing"_s },
>+            { SVGLengthAdjustSpacingAndGlyphs, "spacingAndGlyphs"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGLengthAdjustSpacingAndGlyphs; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGMarkerUnitsType> {
>+    static const SVGEnumValues<SVGMarkerUnitsType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGMarkerUnitsType>> values(std::initializer_list<SVGEnumValue<SVGMarkerUnitsType>> {
>+            { SVGMarkerUnitsUserSpaceOnUse, "userSpaceOnUse"_s },
>+            { SVGMarkerUnitsStrokeWidth,    "strokeWidth"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGMarkerUnitsStrokeWidth; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGMarkerOrientType> {
>+    static const SVGEnumValues<SVGMarkerOrientType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGMarkerOrientType>> values(std::initializer_list<SVGEnumValue<SVGMarkerOrientType>> {
>+            { SVGMarkerOrientAuto,             "auto"_s },
>+            { SVGMarkerOrientAngle,            emptyString() },
>+            { SVGMarkerOrientAutoStartReverse, "auto-start-reverse"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGMarkerOrientAngle; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGSpreadMethodType> {
>+    static const SVGEnumValues<SVGSpreadMethodType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGSpreadMethodType>> values(std::initializer_list<SVGEnumValue<SVGSpreadMethodType>> {
>+            { SVGSpreadMethodPad,     "pad"_s },
>+            { SVGSpreadMethodReflect, "reflect"_s },
>+            { SVGSpreadMethodRepeat,  "repeat"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGSpreadMethodRepeat; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGStitchOptions> {
>+    static const SVGEnumValues<SVGStitchOptions>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGStitchOptions>> values(std::initializer_list<SVGEnumValue<SVGStitchOptions>> {
>+            { SVGStitchTypeStitch,   "stitch"_s },
>+            { SVGStitchTypeNoStitch, "noStitch"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGStitchTypeNoStitch; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGTextPathMethodType> {
>+    static const SVGEnumValues<SVGTextPathMethodType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGTextPathMethodType>> values(std::initializer_list<SVGEnumValue<SVGTextPathMethodType>> {
>+            { SVGTextPathMethodAlign,   "align"_s },
>+            { SVGTextPathMethodStretch, "stretch"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGTextPathMethodStretch; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGTextPathSpacingType> {
>+    static const SVGEnumValues<SVGTextPathSpacingType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGTextPathSpacingType>> values(std::initializer_list<SVGEnumValue<SVGTextPathSpacingType>> {
>+            { SVGTextPathSpacingAuto,    "auto"_s },
>+            { SVGTextPathSpacingExact,   "exact"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGTextPathSpacingExact; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGUnitTypes::SVGUnitType> {
>+    static const SVGEnumValues<SVGUnitTypes::SVGUnitType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGUnitTypes::SVGUnitType>> values(std::initializer_list<SVGEnumValue<SVGUnitTypes::SVGUnitType>> {
>+            { SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE,    "userSpaceOnUse"_s },
>+            { SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX, "objectBoundingBox"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX; }
>+};
>+
>+template<> struct SVGEnumTraits<SVGZoomAndPanType> {
>+    static const SVGEnumValues<SVGZoomAndPanType>& values()
>+    {
>+        static NeverDestroyed<SVGEnumValues<SVGZoomAndPanType>> values(std::initializer_list<SVGEnumValue<SVGZoomAndPanType>> {
>+            { SVGZoomAndPanDisable, "disable"_s },
>+            { SVGZoomAndPanMagnify, "magnify"_s }
>+        });
>+        return values;
>+    }
>+    static constexpr auto highestExposedEnumValue() { return SVGZoomAndPanMagnify; }
>+};
>+
>+};
>diff --git a/Source/WebCore/svg/properties/SVGPrimitiveList.h b/Source/WebCore/svg/properties/SVGPrimitiveList.h
>index 45731a3803167dde136b31ae351a980e7ec72659..a04ff3d34c469c4bd11a6e67305ac3b6d0ec1ec2 100644
>--- a/Source/WebCore/svg/properties/SVGPrimitiveList.h
>+++ b/Source/WebCore/svg/properties/SVGPrimitiveList.h
>@@ -26,15 +26,50 @@
> #pragma once
> 
> #include "SVGList.h"
>+#include "SVGParserUtilities.h"
>+#include "SVGParsingError.h"
>+#include "SVGPropertyTraits.h"
> 
> namespace WebCore {
> 
> template<typename PropertyType>
> class SVGPrimitiveList : public SVGList<PropertyType> {
>-protected:
>     using Base = SVGList<PropertyType>;
>     using Base::Base;
>+    using Base::clearItems;
>     using Base::size;
>+
>+public:
>+    SVGParsingError parse(const String& string)
>+    {
>+        clearItems();
>+
>+        auto upconvertedCharacters = StringView(string).upconvertedCharacters();
>+        const UChar* ptr = upconvertedCharacters;
>+        const UChar* end = ptr + string.length();
>+
>+        bool delimParsed = false;
>+        while (skipOptionalSVGSpaces(ptr, end)) {
>+            delimParsed = false;
>+
>+            ASSERT(ptr < end);
>+            const UChar* start = ptr;
>+            while (ptr < end && !isSVGSpace(*ptr))
>+                ptr++;
>+            
>+            ASSERT(ptr > start);
>+            append(SVGPropertyTraits<PropertyType>::fromString(String(start, ptr - start)));
>+
>+            if (ptr < end && *ptr == ',') {
>+                ++ptr;
>+                delimParsed = true;
>+            }
>+        }
>+
>+        return delimParsed ? UnexpectedEndOfAttributeError : NoError;
>+    }
>+
>+protected:
>     using Base::m_items;
> 
>     PropertyType at(unsigned index) const override
>@@ -70,6 +105,19 @@ protected:
>         m_items.append(WTFMove(newItem));
>         return at(size() - 1);
>     }
>+
>+    String valueAsString() const override
>+    {
>+        StringBuilder builder;
>+
>+        for (auto item : m_items) {
>+            if (builder.length())
>+                builder.append(' ');
>+            builder.append(SVGPropertyTraits<PropertyType>::toString(item));
>+        }
>+
>+        return builder.toString();
>+    }
> };
> 
> }
>diff --git a/Source/WebCore/svg/properties/SVGProperty.h b/Source/WebCore/svg/properties/SVGProperty.h
>index ce65cb110d1fb466e229ec79c9dd017e86129967..c701eff0987e49ba314aa7e4f942707233a7f308 100644
>--- a/Source/WebCore/svg/properties/SVGProperty.h
>+++ b/Source/WebCore/svg/properties/SVGProperty.h
>@@ -28,7 +28,7 @@
> namespace WebCore {
> 
> enum class SVGPropertyAccess : uint8_t { ReadWrite, ReadOnly };
>-enum class SVGPropertyState : uint8_t { Clean, Dirty };
>+enum class SVGPropertyState : uint8_t { Clean, Dirty, Invalid };
> 
> class SVGProperty : public RefCounted<SVGProperty> {
> public:
>@@ -70,11 +70,11 @@ public:
>     bool isReadOnly() const { return m_access == SVGPropertyAccess::ReadOnly; }
> 
>     // Synchronizing the SVG attribute and its reflection here.
>-    bool isDirty() const { return m_state == SVGPropertyState::Dirty; }
>-    void setDirty() { m_state = SVGPropertyState::Dirty; }
>+    SVGPropertyState state() const { return m_state; }
>+    void setState(SVGPropertyState state) { m_state = state; }
>     Optional<String> synchronize()
>     {
>-        if (m_state == SVGPropertyState::Clean)
>+        if (m_state != SVGPropertyState::Dirty)
>             return WTF::nullopt;
>         m_state = SVGPropertyState::Clean;
>         return valueAsString();
>@@ -88,9 +88,10 @@ public:
> #if !COMPILER(MSVC)
> protected:
> #endif
>-    SVGProperty(SVGPropertyOwner* owner = nullptr, SVGPropertyAccess access = SVGPropertyAccess::ReadWrite)
>+    SVGProperty(SVGPropertyOwner* owner = nullptr, SVGPropertyAccess access = SVGPropertyAccess::ReadWrite, SVGPropertyState state = SVGPropertyState::Clean)
>         : m_owner(owner)
>         , m_access(access)
>+        , m_state(state)
>     {
>     }
> 
>diff --git a/Source/WebCore/svg/properties/SVGPropertyTraits.h b/Source/WebCore/svg/properties/SVGPropertyTraits.h
>index bb83e77d364ddd541c3d1cd4b19d4b3238b89c12..9eadd9e312996e1a43067a6b9693884f4ecf1762 100644
>--- a/Source/WebCore/svg/properties/SVGPropertyTraits.h
>+++ b/Source/WebCore/svg/properties/SVGPropertyTraits.h
>@@ -1,7 +1,7 @@
> /*
>  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
>  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
>- * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
>  *
>  * This library is free software; you can redistribute it and/or
>  * modify it under the terms of the GNU Library General Public
>@@ -25,124 +25,97 @@
> #include "Color.h"
> #include "FloatPoint.h"
> #include "FloatRect.h"
>-#include "QualifiedName.h"
> #include "SVGParserUtilities.h"
>+#include "SVGParsingError.h"
>+#include <wtf/Expected.h>
> #include <wtf/text/StringBuilder.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WebCore {
> 
>-template<typename PropertyType>
>+template<typename PropertyType, class Enabler = void>
> struct SVGPropertyTraits { };
> 
> template<>
> struct SVGPropertyTraits<bool> {
>     static bool initialValue() { return false; }
>-    static bool fromString(const String& string) { return string == "true"; }
>-    static Optional<bool> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(bool type) { return type ? "true" : "false"; }
>+    static Expected<bool, SVGParsingError> parse(const String& string)
>+    {
>+        if (string == "true")
>+            return true;
>+        if (string == "false")
>+            return false;
>+        return makeUnexpected(ParsingAttributeFailedError);
>+    }
>+    static bool fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(bool value) { return value ? "true" : "false"; }
> };
> 
> template<>
> struct SVGPropertyTraits<Color> {
>     static Color initialValue() { return Color(); }
>-    static Color fromString(const String& string) { return CSSParser::parseColor(string.stripWhiteSpace()); }
>-    static Optional<Color> parse(const QualifiedName&, const String& string)
>+    static Expected<Color, SVGParsingError> parse(const String& string)
>     {
>-        Color color = CSSParser::parseColor(string.stripWhiteSpace());
>-        if (!color.isValid())
>-            return WTF::nullopt;
>-        return color;
>+        Color value = CSSParser::parseColor(string.stripWhiteSpace());
>+        if (!value.isValid())
>+            return makeUnexpected(ParsingAttributeFailedError);
>+        return value;
>     }
>-    static String toString(const Color& type) { return type.serialized(); }
>-};
>-
>-template<>
>-struct SVGPropertyTraits<unsigned> {
>-    static unsigned initialValue() { return 0; }
>-    static Optional<unsigned> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(unsigned type) { return String::number(type); }
>-};
>-
>-template<>
>-struct SVGPropertyTraits<int> {
>-    static int initialValue() { return 0; }
>-    static int fromString(const String&string) { return string.toIntStrict(); }
>-    static Optional<int> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(int type) { return String::number(type); }
>+    static Color fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(const Color& value) { return value.serialized(); }
> };
> 
> template<>
>-struct SVGPropertyTraits<std::pair<int, int>> {
>-    static std::pair<int, int> initialValue() { return { }; }
>-    static std::pair<int, int> fromString(const String& string)
>-    {
>-        float firstNumber = 0, secondNumber = 0;
>-        if (!parseNumberOptionalNumber(string, firstNumber, secondNumber))
>-            return { };
>-        return std::make_pair(static_cast<int>(roundf(firstNumber)), static_cast<int>(roundf(secondNumber)));
>-    }
>-    static Optional<std::pair<int, int>> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(std::pair<int, int>) { ASSERT_NOT_REACHED(); return emptyString(); }
>+struct SVGPropertyTraits<String> {
>+    static String initialValue() { return String(); }
>+    static Expected<String, SVGParsingError> parse(const String& string) { return string; }
>+    static String fromString(const String& string) { return string; }
>+    static String toString(const String& value) { return value; }
> };
> 
> template<>
> struct SVGPropertyTraits<float> {
>     static float initialValue() { return 0; }
>-    static float fromString(const String& string)
>+    static Expected<float, SVGParsingError> parse(const String& string, SVGParsingOptions parsingOptions = NoOptions)
>     {
>-        float number = 0;
>-        if (!parseNumberFromString(string, number))
>-            return 0;
>-        return number;
>+        float value;
>+        if ((parsingOptions & AllowPercentage) && string.endsWith('%'))
>+            value = string.left(string.length() - 1).toFloat() / 100;
>+        else
>+            value = string.toFloat();
>+        if (auto error = validateNumeric(value, parsingOptions))
>+            return makeUnexpected(error);
>+        return value;
>     }
>-    static Optional<float> parse(const QualifiedName&, const String& string)
>-    {
>-        float number;
>-        if (!parseNumberFromString(string, number))
>-            return WTF::nullopt;
>-        return number;
>-    }
>-    static String toString(float type) { return String::numberToStringFixedPrecision(type); }
>+    static float fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(float value) { return String::numberToStringFixedPrecision(value); }
> };
> 
> template<>
>-struct SVGPropertyTraits<std::pair<float, float>> {
>-    static std::pair<float, float> initialValue() { return { }; }
>-    static std::pair<float, float> fromString(const String& string)
>-    {
>-        float firstNumber = 0, secondNumber = 0;
>-        if (!parseNumberOptionalNumber(string, firstNumber, secondNumber))
>-            return { };
>-        return std::make_pair(firstNumber, secondNumber);
>-    }
>-    static Optional<std::pair<float, float>> parse(const QualifiedName&, const String&) { ASSERT_NOT_REACHED(); return initialValue(); }
>-    static String toString(std::pair<float, float>) { ASSERT_NOT_REACHED(); return emptyString(); }
>+struct SVGPropertyTraits<int> {
>+    static int initialValue() { return 0; }
>+    static Expected<int, SVGParsingError> parse(const String& string) { return string.toIntStrict(); }
>+    static int fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(int value) { return String::number(value); }
> };
> 
> template<>
> struct SVGPropertyTraits<FloatPoint> {
>     static FloatPoint initialValue() { return FloatPoint(); }
>-    static FloatPoint fromString(const String& string)
>-    {
>-        FloatPoint point;
>-        if (!parsePoint(string, point))
>-            return { };
>-        return point;
>-    }
>-    static Optional<FloatPoint> parse(const QualifiedName&, const String& string)
>+    static Expected<FloatPoint, SVGParsingError> parse(const String& string)
>     {
>-        FloatPoint point;
>-        if (!parsePoint(string, point))
>-            return WTF::nullopt;
>-        return point;
>+        FloatPoint value;
>+        if (!parsePoint(string, value))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+        return value;
>     }
>-    static String toString(const FloatPoint& type)
>+    static FloatPoint fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(const FloatPoint& value)
>     {
>         StringBuilder builder;
>-        builder.appendFixedPrecisionNumber(type.x());
>+        builder.appendFixedPrecisionNumber(value.x());
>         builder.append(' ');
>-        builder.appendFixedPrecisionNumber(type.y());
>+        builder.appendFixedPrecisionNumber(value.y());
>         return builder.toString();
>     }
> };
>@@ -150,46 +123,73 @@ struct SVGPropertyTraits<FloatPoint> {
> template<>
> struct SVGPropertyTraits<FloatRect> {
>     static FloatRect initialValue() { return FloatRect(); }
>-    static FloatRect fromString(const String& string)
>-    {
>-        FloatRect rect;
>-        if (!parseRect(string, rect))
>-            return { };
>-        return rect;
>-    }
>-    static Optional<FloatRect> parse(const QualifiedName&, const String& string)
>+    static Expected<FloatRect, SVGParsingError> parse(const String& string, SVGParsingOptions parsingOptions = NoOptions)
>     {
>-        FloatRect rect;
>-        if (!parseRect(string, rect))
>-            return WTF::nullopt;
>-        return rect;
>+        FloatRect value;
>+        if (!parseRect(string, value))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+        if (auto error = validateNumeric(value.width(), parsingOptions))
>+            return makeUnexpected(error);
>+        if (auto error = validateNumeric(value.height(), parsingOptions))
>+            return makeUnexpected(error);
>+        return value;
>     }
>-    static String toString(const FloatRect& type)
>+    static FloatRect fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(const FloatRect& value)
>     {
>         StringBuilder builder;
>-        builder.appendFixedPrecisionNumber(type.x());
>+        builder.appendFixedPrecisionNumber(value.x());
>         builder.append(' ');
>-        builder.appendFixedPrecisionNumber(type.y());
>+        builder.appendFixedPrecisionNumber(value.y());
>         builder.append(' ');
>-        builder.appendFixedPrecisionNumber(type.width());
>+        builder.appendFixedPrecisionNumber(value.width());
>         builder.append(' ');
>-        builder.appendFixedPrecisionNumber(type.height());
>+        builder.appendFixedPrecisionNumber(value.height());
>         return builder.toString();
>     }
> };
> 
> template<>
>-struct SVGPropertyTraits<String> {
>-    static String initialValue() { return String(); }
>-    static String fromString(const String& string) { return string; }
>-    static Optional<String> parse(const QualifiedName&, const String& string) { return string; }
>-    static String toString(const String& string) { return string; }
>+struct SVGPropertyTraits<std::pair<int, int>> {
>+    static std::pair<int, int> initialValue() { return { }; }
>+    static Expected<std::pair<int, int>, SVGParsingError> parse(const String& string, SVGParsingOptions parsingOptions = NoOptions)
>+    {
>+        float valueNumber1 = 0, valueNumber2 = 0;
>+        if (!parseNumberOptionalNumber(string, valueNumber1, valueNumber2))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        int valueInteger1 = static_cast<int>(roundf(valueNumber1));
>+        int valueInteger2 = static_cast<int>(roundf(valueNumber2));
>+
>+        if (auto error = validateNumeric(valueInteger1, parsingOptions))
>+            return makeUnexpected(error);
>+        if (auto error = validateNumeric(valueInteger2, parsingOptions))
>+            return makeUnexpected(error);
>+
>+        return std::make_pair(valueInteger1, valueInteger2);
>+    }
>+    static std::pair<int, int> fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(const std::pair<int, int>& value) { return SVGPropertyTraits<int>::toString(value.first) + ", " + SVGPropertyTraits<int>::toString(value.second); }
> };
> 
>-template<typename EnumType>
>-struct SVGIDLEnumLimits {
>-    // Specialize this function for a particular enumeration to limit the values that are exposed through the DOM.
>-    static unsigned highestExposedEnumValue() { return SVGPropertyTraits<EnumType>::highestEnumValue(); }
>+template<>
>+struct SVGPropertyTraits<std::pair<float, float>> {
>+    static std::pair<float, float> initialValue() { return { }; }
>+    static Expected<std::pair<float, float>, SVGParsingError> parse(const String& string, SVGParsingOptions parsingOptions = NoOptions)
>+    {
>+        float valueNumber1 = 0, valueNumber2 = 0;
>+        if (!parseNumberOptionalNumber(string, valueNumber1, valueNumber2))
>+            return makeUnexpected(ParsingAttributeFailedError);
>+
>+        if (auto error = validateNumeric(valueNumber1, parsingOptions))
>+            return makeUnexpected(error);
>+        if (auto error = validateNumeric(valueNumber2, parsingOptions))
>+            return makeUnexpected(error);
>+
>+        return std::make_pair(valueNumber1, valueNumber2);
>+    }
>+    static std::pair<float, float> fromString(const String& string) { return parse(string).value_or(initialValue()); }
>+    static String toString(const std::pair<float, float>& value) { return SVGPropertyTraits<float>::toString(value.first) + ", " + SVGPropertyTraits<float>::toString(value.second); }
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/properties/SVGValueProperty.h b/Source/WebCore/svg/properties/SVGValueProperty.h
>index 9f31e2d0f539cc2023b63f870686f0ed81dc29ce..559fbf51ead2ffa4ef0bab3126def3a7b006dbb3 100644
>--- a/Source/WebCore/svg/properties/SVGValueProperty.h
>+++ b/Source/WebCore/svg/properties/SVGValueProperty.h
>@@ -64,8 +64,8 @@ protected:
>     }
> 
>     // Base and default constructor. Do not use "using SVGProperty::SVGProperty" because of Windows and GTK ports.
>-    SVGValueProperty(SVGPropertyOwner* owner = nullptr, SVGPropertyAccess access = SVGPropertyAccess::ReadWrite)
>-        : SVGProperty(owner, access)
>+    SVGValueProperty(SVGPropertyOwner* owner = nullptr, SVGPropertyAccess access = SVGPropertyAccess::ReadWrite, SVGPropertyState state = SVGPropertyState::Clean)
>+        : SVGProperty(owner, access, state)
>     {
>     }
> 
>diff --git a/Source/WebCore/svg/properties/SVGValuePropertyList.h b/Source/WebCore/svg/properties/SVGValuePropertyList.h
>index 3010c33a74089bc44fbb410a56f785a9f717ccee..4eb93838fa0a03361357de1c0f0da09f3afa3154 100644
>--- a/Source/WebCore/svg/properties/SVGValuePropertyList.h
>+++ b/Source/WebCore/svg/properties/SVGValuePropertyList.h
>@@ -66,6 +66,48 @@ public:
>             remove(size() - 1);
>     }
> 
>+    template<typename... Arguments>
>+    SVGParsingError parse(const String& string, Arguments&&... arguments)
>+    {
>+        clearItems();
>+
>+        auto upconvertedCharacters = StringView(string).upconvertedCharacters();
>+        const UChar* ptr = upconvertedCharacters;
>+        const UChar* end = ptr + string.length();
>+
>+        bool delimParsed = false;
>+        while (skipOptionalSVGSpaces(ptr, end)) {
>+            delimParsed = false;
>+
>+            ASSERT(ptr < end);
>+            auto expectedItem = PropertyType::create(ptr, end, std::forward<Arguments>(arguments)...);
>+            if (!expectedItem)
>+                return expectedItem.error();
>+
>+            append(WTFMove(expectedItem.value()));
>+
>+            if (ptr < end && *ptr == ',') {
>+                ++ptr;
>+                delimParsed = true;
>+            }
>+        }
>+
>+        return delimParsed ? UnexpectedEndOfAttributeError : NoError;
>+    }
>+
>+    String valueAsString() const override
>+    {
>+        StringBuilder builder;
>+
>+        for (const auto& item : items()) {
>+            if (builder.length())
>+                builder.append(' ');
>+            builder.append(item->valueAsString());
>+        }
>+
>+        return builder.toString();
>+    }
>+
>     // Visual Studio doesn't seem to see these private constructors from subclasses.
>     // FIXME: See what it takes to remove this hack.
> #if !COMPILER(MSVC)
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 74e8b9e7e994f9d394b7b52853d074c087313e8a..a25f3d04a7b7340a9a431e82da5cd0c3cd5f99ed 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,67 @@
>+2019-06-08  Said Abou-Hallawa  <said@apple.com>
>+
>+        SVGPropertyTraits and SVG enum types clean up
>+        https://bugs.webkit.org/show_bug.cgi?id=198073
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * svg/animations/svgnumber-animation-3-expected.txt:
>+        * svg/animations/svgnumber-animation-3.html:
>+        The expected values of this test were wrong. The test is supposed to verify
>+        the values at 0%, 50%, just before 100% and 100%. The change in the opacity
>+        of the element should be: 0, 0.5, 1, 0. The test was expecting all values
>+        to be zeros.
>+
>+2019-05-20  Said Abou-Hallawa  <sabouhallawa@apple.com>
>+
>+        Unify the parsing of SVGList super classes
>+        https://bugs.webkit.org/show_bug.cgi?id=197831
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * html5lib/generated/run-tests11-data-expected.txt:
>+        * html5lib/generated/run-tests11-write-expected.txt:
>+        Report error messages if a SVGPreserveAspectRatio or SVGZoomAndPan parsing
>+        error happens.
>+
>+        * platform/gtk/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/gtk/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/gtk/svg/hixie/error/010-expected.txt:
>+        * platform/gtk/svg/hixie/error/011-expected.txt:
>+        * platform/ios/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/ios/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/ios/svg/hixie/error/010-expected.txt:
>+        * platform/ios/svg/hixie/error/011-expected.txt:
>+        * platform/mac/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/mac/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/mac/svg/hixie/error/010-expected.txt:
>+        * platform/mac/svg/hixie/error/011-expected.txt:
>+        * platform/win/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/win/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/win/svg/hixie/error/010-expected.txt:
>+        * platform/win/svg/hixie/error/011-expected.txt:
>+        * platform/wincairo/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/wincairo/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/wpe/svg/custom/preserve-aspect-ratio-syntax-expected.txt:
>+        * platform/wpe/svg/custom/viewbox-syntax-expected.txt:
>+        * platform/wpe/svg/hixie/error/010-expected.txt:
>+        * platform/wpe/svg/hixie/error/011-expected.txt:
>+        Replace the parsing warning messages by error messages. Report error
>+        messages if a SVGPreserveAspectRatio parsing error happens.
>+
>+        * svg/dom/length-list-parser-expected.txt:
>+        SVGLengthList was treating the leading spaces in the attribute value as
>+        an error.
>+
>+        * svg/dom/viewspec-parser-1-expected.txt:
>+        * svg/dom/viewspec-parser-1.html:
>+        Extra text at the end of svgView attribute value was not treated as an
>+        error.
>+
>+        * svg/hixie/error/010-expected.txt:
>+        * svg/hixie/error/011-expected.txt:
>+        Replace the parsing warning messages by error messages.
>+
> 2019-06-08  Cathie Chen  <cathiechen@igalia.com>
> 
>         resize-observer/element-leak.html fails on Windows platform
>diff --git a/LayoutTests/imported/w3c/ChangeLog b/LayoutTests/imported/w3c/ChangeLog
>index f1cb90389a88384bd0e5f0341f028cc71e33ecd5..4936be5d77233e826bab2d51d1ff3bf0f45a4e08 100644
>--- a/LayoutTests/imported/w3c/ChangeLog
>+++ b/LayoutTests/imported/w3c/ChangeLog
>@@ -1,3 +1,25 @@
>+2019-06-08  Said Abou-Hallawa  <said@apple.com>
>+
>+        Unify the parsing of SVGList super classes
>+        https://bugs.webkit.org/show_bug.cgi?id=198073
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt:
>+        Report error messages if a SVGPreserveAspectRatio or SVGZoomAndPan parsing
>+        error happens.
>+
>+2019-05-20  Said Abou-Hallawa  <sabouhallawa@apple.com>
>+
>+        Unify the parsing of SVGList super classes
>+        https://bugs.webkit.org/show_bug.cgi?id=197831
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt:
>+        Report error messages if a SVGPreserveAspectRatio or SVGZoomAndPan parsing
>+        error happens.
>+
> 2019-06-07  Joonghun Park  <jh718.park@samsung.com>
> 
>         Implement tab-size with units
>diff --git a/LayoutTests/html5lib/generated/run-tests11-data-expected.txt b/LayoutTests/html5lib/generated/run-tests11-data-expected.txt
>index 176b5c07c78b1e10063570e5e65202586de804a8..4e4fbc020dbd45ca3028a5e95fa1dabc705f900c 100644
>--- a/LayoutTests/html5lib/generated/run-tests11-data-expected.txt
>+++ b/LayoutTests/html5lib/generated/run-tests11-data-expected.txt
>@@ -1,4 +1,10 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
> ../resources/tests11.dat: PASS
>diff --git a/LayoutTests/html5lib/generated/run-tests11-write-expected.txt b/LayoutTests/html5lib/generated/run-tests11-write-expected.txt
>index 9ac682ae92d7dcd14bbc9acc98eb36b84b65eecc..a89309cb322645079eeaa9b0b561c0d320423c93 100644
>--- a/LayoutTests/html5lib/generated/run-tests11-write-expected.txt
>+++ b/LayoutTests/html5lib/generated/run-tests11-write-expected.txt
>@@ -1,4 +1,10 @@
>-CONSOLE MESSAGE: line 168: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 168: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 168: Warning: Problem parsing viewBox=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 168: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 168: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 168: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 168: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
> ../resources/tests11.dat: PASS
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt
>index 5f30fc8d042c733e49586bc9e8ec6cf96915c8ef..ae9072828bd36aff2ea7fcc62dc51791e3a9246f 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/html5lib_tests11-expected.txt
>@@ -1,6 +1,12 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute preserveAspectRatio=""
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox=""
>+CONSOLE MESSAGE: line 1: Error: Unrecognized enumerated value for <svg> attribute zoomAndPan=""
> html5lib Parser Test
> 
> 
>diff --git a/LayoutTests/platform/gtk/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/gtk/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index d964c5e7d6556a68e58e4c1eb4eb47b85790b2b3..41508ae1949af08713c9a3c1955e6e2c1b3383e4 100644
>--- a/LayoutTests/platform/gtk/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/gtk/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/gtk/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/gtk/svg/custom/viewbox-syntax-expected.txt
>index e0ddef53677bd1d3b0bfa25aaaa44b4b0d9fb95e..4bfbeb2c7b279a2bdd23c833015d1ada83b9eff0 100644
>--- a/LayoutTests/platform/gtk/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/gtk/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/gtk/svg/hixie/error/010-expected.txt b/LayoutTests/platform/gtk/svg/hixie/error/010-expected.txt
>index b7ad4f967d1c013c7800f7a0b46bd1fa70d494d8..dd2070539e16d9e83f1325c90c880af8ff77595c 100644
>--- a/LayoutTests/platform/gtk/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/platform/gtk/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/gtk/svg/hixie/error/011-expected.txt b/LayoutTests/platform/gtk/svg/hixie/error/011-expected.txt
>index a5d8be7846aa84d58b473b851895a95db90c4de7..9d09fc6816e9415ece6249d6fd26b367dbe6097c 100644
>--- a/LayoutTests/platform/gtk/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/platform/gtk/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/ios/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/ios/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index 7378a37bab831cbd48c1a78745a7a22fd5d0a94b..e237ab3a9d1e118c70aa536cca487460dd7f2690 100644
>--- a/LayoutTests/platform/ios/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/ios/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/ios/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/ios/svg/custom/viewbox-syntax-expected.txt
>index c9b1a25acf21ca90057dcc3a748b3b9efe502da9..93ae5a33b284ce3ffbb58fbdfd12566c4581a55f 100644
>--- a/LayoutTests/platform/ios/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/ios/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/ios/svg/hixie/error/010-expected.txt b/LayoutTests/platform/ios/svg/hixie/error/010-expected.txt
>index 92bcc39fa7348cb3500b91538cd792afbd4e3a49..458ac40cebeafe3f8582a91d56c32a6149247ce6 100644
>--- a/LayoutTests/platform/ios/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/platform/ios/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/ios/svg/hixie/error/011-expected.txt b/LayoutTests/platform/ios/svg/hixie/error/011-expected.txt
>index fbf48c0a35490f324819be0c7873efa607d8d4a2..76df56ffafcd510acb27bdd790bec2371c1d504d 100644
>--- a/LayoutTests/platform/ios/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/platform/ios/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/mac/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/mac/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index 4a1f34a7cc112b6c274bcb004edbefc117aea998..ac91f9618f1abb0613343ac6200c41e03d4ff51d 100644
>--- a/LayoutTests/platform/mac/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/mac/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/mac/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/mac/svg/custom/viewbox-syntax-expected.txt
>index 899afcef73be684197908acb5d8abcce0380a8c0..2bcbf8e653428cf1fc3e9912bf25a3cad0469ad2 100644
>--- a/LayoutTests/platform/mac/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/mac/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/mac/svg/hixie/error/010-expected.txt b/LayoutTests/platform/mac/svg/hixie/error/010-expected.txt
>index 92bcc39fa7348cb3500b91538cd792afbd4e3a49..458ac40cebeafe3f8582a91d56c32a6149247ce6 100644
>--- a/LayoutTests/platform/mac/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/platform/mac/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/mac/svg/hixie/error/011-expected.txt b/LayoutTests/platform/mac/svg/hixie/error/011-expected.txt
>index fbf48c0a35490f324819be0c7873efa607d8d4a2..76df56ffafcd510acb27bdd790bec2371c1d504d 100644
>--- a/LayoutTests/platform/mac/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/platform/mac/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/win/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/win/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index d6d10572689867d3e1dc298e573c6367b2bc0494..191f3e635f189901897e7bd260bf20b4fdabe433 100644
>--- a/LayoutTests/platform/win/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/win/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/win/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/win/svg/custom/viewbox-syntax-expected.txt
>index 626cd6a946a259a69b94bd9030e32e1a2647da47..f994178f8dce78f1a74af39e04d7f33a6f82ec32 100644
>--- a/LayoutTests/platform/win/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/win/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/win/svg/hixie/error/010-expected.txt b/LayoutTests/platform/win/svg/hixie/error/010-expected.txt
>index b7ad4f967d1c013c7800f7a0b46bd1fa70d494d8..dd2070539e16d9e83f1325c90c880af8ff77595c 100644
>--- a/LayoutTests/platform/win/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/platform/win/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/win/svg/hixie/error/011-expected.txt b/LayoutTests/platform/win/svg/hixie/error/011-expected.txt
>index a5d8be7846aa84d58b473b851895a95db90c4de7..9d09fc6816e9415ece6249d6fd26b367dbe6097c 100644
>--- a/LayoutTests/platform/win/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/platform/win/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wincairo/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/wincairo/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index 5f67704c7a14c7f9f36f8e5deff99cf5fa9ed51c..3cf185a18c9a10d59e9f0985f1e204327bde39d2 100644
>--- a/LayoutTests/platform/wincairo/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/wincairo/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wincairo/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/wincairo/svg/custom/viewbox-syntax-expected.txt
>index d81325f8aa74ef0e33124b9c994599209bd9d04a..5168c075c303090ad3f5820539d478b618cb4fde 100644
>--- a/LayoutTests/platform/wincairo/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/wincairo/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wpe/svg/custom/preserve-aspect-ratio-syntax-expected.txt b/LayoutTests/platform/wpe/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>index 99b703d32f5d5128781c1fbf0de8919e9cb8e848..b1bb55f7498d5e9696c7be906c4f64f5dff3e733 100644
>--- a/LayoutTests/platform/wpe/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>+++ b/LayoutTests/platform/wpe/svg/custom/preserve-aspect-ratio-syntax-expected.txt
>@@ -1,3 +1,8 @@
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute preserveAspectRatio="defer meet"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute preserveAspectRatio="defer xMidYMid meet a"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute preserveAspectRatio="defer 1 xMidYMid meet"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute preserveAspectRatio="defer , xMidYMid meet"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute preserveAspectRatio=""
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wpe/svg/custom/viewbox-syntax-expected.txt b/LayoutTests/platform/wpe/svg/custom/viewbox-syntax-expected.txt
>index 2f92ff2e37fa3301390a94a826d0be9eb4e870c9..f8d32e39e0e17b72699fe498896d03bda13b8336 100644
>--- a/LayoutTests/platform/wpe/svg/custom/viewbox-syntax-expected.txt
>+++ b/LayoutTests/platform/wpe/svg/custom/viewbox-syntax-expected.txt
>@@ -1,13 +1,13 @@
>-CONSOLE MESSAGE: line 20: Warning: Problem parsing viewBox="0"
>-CONSOLE MESSAGE: line 23: Warning: Problem parsing viewBox="0 0"
>-CONSOLE MESSAGE: line 26: Warning: Problem parsing viewBox="0 0 30"
>-CONSOLE MESSAGE: line 29: Warning: Problem parsing viewBox="0 0 30 40 50"
>-CONSOLE MESSAGE: line 32: Warning: Problem parsing viewBox="0 0 30 40,"
>-CONSOLE MESSAGE: line 35: Warning: Problem parsing viewBox=",0 0 30 40"
>-CONSOLE MESSAGE: line 38: Error: A negative value for ViewBox width is not allowed
>-CONSOLE MESSAGE: line 41: Error: A negative value for ViewBox height is not allowed
>-CONSOLE MESSAGE: line 44: Warning: Problem parsing viewBox="0 0 30, , 40"
>-CONSOLE MESSAGE: line 47: Warning: Problem parsing viewBox="0 0 30% 40"
>+CONSOLE MESSAGE: line 20: Error: Invalid value for <svg> attribute viewBox="0"
>+CONSOLE MESSAGE: line 23: Error: Invalid value for <svg> attribute viewBox="0 0"
>+CONSOLE MESSAGE: line 26: Error: Invalid value for <svg> attribute viewBox="0 0 30"
>+CONSOLE MESSAGE: line 29: Error: Invalid value for <svg> attribute viewBox="0 0 30 40 50"
>+CONSOLE MESSAGE: line 32: Error: Invalid value for <svg> attribute viewBox="0 0 30 40,"
>+CONSOLE MESSAGE: line 35: Error: Invalid value for <svg> attribute viewBox=",0 0 30 40"
>+CONSOLE MESSAGE: line 38: Error: Invalid negative value for <svg> attribute viewBox="0 0 -30 40"
>+CONSOLE MESSAGE: line 41: Error: Invalid negative value for <svg> attribute viewBox="0 0 30 -40"
>+CONSOLE MESSAGE: line 44: Error: Invalid value for <svg> attribute viewBox="0 0 30, , 40"
>+CONSOLE MESSAGE: line 47: Error: Invalid value for <svg> attribute viewBox="0 0 30% 40"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wpe/svg/hixie/error/010-expected.txt b/LayoutTests/platform/wpe/svg/hixie/error/010-expected.txt
>index b7ad4f967d1c013c7800f7a0b46bd1fa70d494d8..dd2070539e16d9e83f1325c90c880af8ff77595c 100644
>--- a/LayoutTests/platform/wpe/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/platform/wpe/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/platform/wpe/svg/hixie/error/011-expected.txt b/LayoutTests/platform/wpe/svg/hixie/error/011-expected.txt
>index a5d8be7846aa84d58b473b851895a95db90c4de7..9d09fc6816e9415ece6249d6fd26b367dbe6097c 100644
>--- a/LayoutTests/platform/wpe/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/platform/wpe/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/svg/animations/svgnumber-animation-3-expected.txt b/LayoutTests/svg/animations/svgnumber-animation-3-expected.txt
>index dd3525d1a5bbe0d94adb2ab6f51604341dccb0a2..e9f031b278e9d089005c8dc20b42a3f59a4cde62 100644
>--- a/LayoutTests/svg/animations/svgnumber-animation-3-expected.txt
>+++ b/LayoutTests/svg/animations/svgnumber-animation-3-expected.txt
>@@ -6,8 +6,8 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
> 
> 
> PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 0
>-PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 0
>-PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 0
>+PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 0.5
>+PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 1
> PASS getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER) is 0
> PASS successfullyParsed is true
> 
>diff --git a/LayoutTests/svg/animations/svgnumber-animation-3.html b/LayoutTests/svg/animations/svgnumber-animation-3.html
>index b60da83a74de900b40014898d74272283c03f4c7..8bc442699f45a0f9a76b6640eaee9c72299841b0 100644
>--- a/LayoutTests/svg/animations/svgnumber-animation-3.html
>+++ b/LayoutTests/svg/animations/svgnumber-animation-3.html
>@@ -36,15 +36,15 @@ rootSVGElement.appendChild(rect);
> // Setup animation test
> function sample1() {
>     // Check initial/end conditions
>-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
>+    shouldBeCloseEnough("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
> }
> 
> function sample2() {
>-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
>+    shouldBeCloseEnough("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0.5");
> }
> 
> function sample3() {
>-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
>+    shouldBeCloseEnough("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "1");
> }
> 
> function executeTest() {
>diff --git a/LayoutTests/svg/dom/length-list-parser-expected.txt b/LayoutTests/svg/dom/length-list-parser-expected.txt
>index eef063076bd4de61794511937a61f0165507b7ba..c3082db1c6f32f768f19b901c75019431c8aa96b 100644
>--- a/LayoutTests/svg/dom/length-list-parser-expected.txt
>+++ b/LayoutTests/svg/dom/length-list-parser-expected.txt
>@@ -5,8 +5,10 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
> 
> Parsed as 1 length(s) [ 8.847 ]: 8.847
> Parsed as 1 length(s) [ 8.62569e+6 ]: 8625686 3.0-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001, 90,e4997..,782-4326e.	-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000013e,+e9	e 4829.,063721-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e6 072
>+Parsed as 8 length(s) [ 28, -8, 0, 47, 4, 0, 35, 684 ]:  28	-8 -0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,47 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -14,6 +16,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -21,6 +24,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -28,6 +32,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -35,6 +40,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -42,6 +48,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -49,6 +56,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -56,6 +64,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -63,6 +72,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -70,6 +80,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -77,6 +88,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> Parsed as 1 length(s) [ 1 ]: 1,.,+.833+.004 2-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001+.9-	8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001.7980-555-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-198	50
> Parsed as 1 length(s) [ 564281 ]: 564281 0ee51+ e 	378584833	,.141	e8-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-53. 88530-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010	8.-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018.847e28886-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014e85 .-1-
>@@ -84,6 +96,7 @@ Parsed as 3 length(s) [ 0, 9, 367 ]: -0.0000000000000000000000000000000000000000
> Parsed as 4 length(s) [ 4, 0, 35, 684 ]: 04,-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001993,35	+684 +	159e   +.3-e0+,812-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001728-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014+,--1-26e666460-79.5-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000169603-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010641,,572-960	1-9 289	
> Parsed as 1 length(s) [ 61822 ]: 61822,15-00.166.7 
> Parsed as 2 length(s) [ 2, 0.5 ]: 2	.5,658-7 e ,8477553
>+Parsed as 1 length(s) [ 2183 ]:  2183 9-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000191,59-- 70478.,566964784	e1-53	847e0.6e34805-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 975	922e,4	+e0e-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 .
> Parsed as 3 length(s) [ 8, 2, 589 ]: 8 2 589	-45e58 -4	-0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001e58-++689.-98-,42 94564.,967-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011+ ,9+6-	.765+-87 e. 68	9452182-0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016.. 1	+
> PASS successfullyParsed is true
> 
>diff --git a/LayoutTests/svg/dom/viewspec-parser-1-expected.txt b/LayoutTests/svg/dom/viewspec-parser-1-expected.txt
>index d442f1bf9111d3bd728a57af158aebb6a524151c..93d3c64de7afda3b4bd21a3e23b5e3eda932dc7e 100644
>--- a/LayoutTests/svg/dom/viewspec-parser-1-expected.txt
>+++ b/LayoutTests/svg/dom/viewspec-parser-1-expected.txt
>@@ -6,8 +6,8 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
> Loaded: resources/viewspec-target.svg#
> Parsed: [initial view] from: [initial view]
> 
>-Loaded: resources/viewspec-target.svg#svgView(viewBox(0,0,200,200)))
>-Parsed: svgView(viewBox(0 0 200 200)) from: svgView(viewBox(0,0,200,200)))
>+Loaded: resources/viewspec-target.svg#svgView(viewBox(0,0,200,200))
>+Parsed: svgView(viewBox(0 0 200 200)) from: svgView(viewBox(0,0,200,200))
> 
> Loaded: resources/viewspec-target.svg#svgView(preserveAspectRatio(xMaxYMin slice))
> Parsed: svgView(preserveAspectRatio(xMaxYMin slice)) from: svgView(preserveAspectRatio(xMaxYMin slice))
>diff --git a/LayoutTests/svg/dom/viewspec-parser-1.html b/LayoutTests/svg/dom/viewspec-parser-1.html
>index 5b17d75921288e1c0a0e671d55f24fab674370af..62173e62f3cd433c2afa19b4cce35a85ab2620a1 100644
>--- a/LayoutTests/svg/dom/viewspec-parser-1.html
>+++ b/LayoutTests/svg/dom/viewspec-parser-1.html
>@@ -18,7 +18,7 @@
>     };
> 
>     var tests = [
>-      "svgView(viewBox(0,0,200,200)))",
>+      "svgView(viewBox(0,0,200,200))",
>       "svgView(preserveAspectRatio(xMaxYMin slice))",
>       "svgView(preserveAspectRatio(xMaxYMin))",
>       "svgView(viewBox(1,2,3,4);preserveAspectRatio(xMaxYMin))",
>diff --git a/LayoutTests/svg/hixie/error/010-expected.txt b/LayoutTests/svg/hixie/error/010-expected.txt
>index f7d359b91db953d522a669cdb993f947294845a7..49018244e664210d177b448e342626ecd49e7ca7 100644
>--- a/LayoutTests/svg/hixie/error/010-expected.txt
>+++ b/LayoutTests/svg/hixie/error/010-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0 1 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0 1 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600
>diff --git a/LayoutTests/svg/hixie/error/011-expected.txt b/LayoutTests/svg/hixie/error/011-expected.txt
>index 7c241b6462071415c1d03828c055a4e39287c281..cacec5f8cbd532dba6684617bfc8a6be4a4518ec 100644
>--- a/LayoutTests/svg/hixie/error/011-expected.txt
>+++ b/LayoutTests/svg/hixie/error/011-expected.txt
>@@ -1,4 +1,4 @@
>-CONSOLE MESSAGE: line 1: Warning: Problem parsing viewBox="0 0,, 1 1"
>+CONSOLE MESSAGE: line 1: Error: Invalid value for <svg> attribute viewBox="0 0,, 1 1"
> layer at (0,0) size 800x600
>   RenderView at (0,0) size 800x600
> layer at (0,0) size 800x600

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Attachments on bug 198695: 371692 | 373847