Attachment 370110 Details for Bug 197943 – Patch

[patch] Patch

bug-197943-20190517103241.patch (text/plain), 25.64 KB, created by Antoine Quint on 2019-05-17 01:32:42 PDT

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Creator: Antoine Quint

Created: 2019-05-17 01:32:42 PDT

Size: 25.64 KB

patch

obsolete

>Subversion Revision: 245433
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 6e0da59b8d247ed8c0640176650fbd4296e08938..7f9ea957928df4e44eaf3392c813075c0e007587 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,20 @@
>+2019-05-17  Antoine Quint  <graouts@apple.com>
>+
>+        Add a website policy to disable the legacy -webkit-overflow-scrolling:touch behavior
>+        https://bugs.webkit.org/show_bug.cgi?id=197943
>+        <rdar://problem/49078202>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Tests: fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode.html
>+               platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode.html
>+
>+        * css/parser/CSSParserContext.cpp:
>+        (WebCore::CSSParserContext::CSSParserContext):
>+        * loader/DocumentLoader.h:
>+        (WebCore::DocumentLoader::legacyOverflowScrollingTouchPolicy const):
>+        (WebCore::DocumentLoader::setLegacyOverflowScrollingTouchPolicy):
>+
> 2019-05-16  Greg Doolittle  <gr3g@apple.com>
> 
>         AX: Unship some ARIA string reflectors that are to-be-replaced by element reflection
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index d6247a923fdd6f4437f400364ce79e57e3aea622..d20ec48b6760450c13dbd0e23f4ca21883a31363 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,23 @@
>+2019-05-17  Antoine Quint  <graouts@apple.com>
>+
>+        Add a website policy to disable the legacy -webkit-overflow-scrolling:touch behavior
>+        https://bugs.webkit.org/show_bug.cgi?id=197943
>+        <rdar://problem/49078202>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Shared/WebsiteLegacyOverflowScrollingTouchPolicy.h: Added.
>+        * Shared/WebsitePoliciesData.cpp:
>+        (WebKit::WebsitePoliciesData::encode const):
>+        (WebKit::WebsitePoliciesData::decode):
>+        (WebKit::WebsitePoliciesData::applyToDocumentLoader):
>+        * Shared/WebsitePoliciesData.h:
>+        * UIProcess/API/APIWebsitePolicies.cpp:
>+        (API::WebsitePolicies::copy const):
>+        (API::WebsitePolicies::data):
>+        * UIProcess/API/APIWebsitePolicies.h:
>+        * WebKit.xcodeproj/project.pbxproj:
>+
> 2019-05-16  John Wilander  <wilander@apple.com>
> 
>         Storage Access API: Call completion handlers in NetworkConnectionToWebProcess::hasStorageAccess() and NetworkConnectionToWebProcess::requestStorageAccess() when feature is off
>diff --git a/Source/WebCore/css/parser/CSSParserContext.cpp b/Source/WebCore/css/parser/CSSParserContext.cpp
>index 29f231c44225f8aa682d17330cbffa22e51ad4ab..7537188cb93d301c824a788d53953eaec034971b 100644
>--- a/Source/WebCore/css/parser/CSSParserContext.cpp
>+++ b/Source/WebCore/css/parser/CSSParserContext.cpp
>@@ -27,6 +27,7 @@
> #include "CSSParserContext.h"
> 
> #include "Document.h"
>+#include "DocumentLoader.h"
> #include "Page.h"
> #include "RuntimeEnabledFeatures.h"
> #include "Settings.h"
>@@ -60,6 +61,12 @@ CSSParserContext::CSSParserContext(const Document& document, const URL& sheetBas
> #endif
> #if ENABLE(OVERFLOW_SCROLLING_TOUCH)
>     legacyOverflowScrollingTouchEnabled = document.settings().legacyOverflowScrollingTouchEnabled();
>+    // The legacy -webkit-overflow-scrolling: touch behavior may have been disabled through the website policy,
>+    // in that case we want to disable the legacy behavior regardless of what the setting says.
>+    if (auto* loader = document.loader()) {
>+        if (loader->legacyOverflowScrollingTouchPolicy() == LegacyOverflowScrollingTouchPolicy::Disable)
>+            legacyOverflowScrollingTouchEnabled = false;
>+    }
> #endif
>     springTimingFunctionEnabled = document.settings().springTimingFunctionEnabled();
>     constantPropertiesEnabled = document.settings().constantPropertiesEnabled();
>diff --git a/Source/WebCore/loader/DocumentLoader.h b/Source/WebCore/loader/DocumentLoader.h
>index 81443826d5c65e022a4380300d18fa4c6902f33b..0eba98ff9c9b3423ffeda74a1811fe0f665fed06 100644
>--- a/Source/WebCore/loader/DocumentLoader.h
>+++ b/Source/WebCore/loader/DocumentLoader.h
>@@ -131,6 +131,12 @@ enum class SimulatedMouseEventsDispatchPolicy : uint8_t {
>     Deny,
> };
> 
>+enum class LegacyOverflowScrollingTouchPolicy : uint8_t {
>+    Default,
>+    Disable,
>+    Enable,
>+};
>+
> class DocumentLoader
>     : public RefCounted<DocumentLoader>
>     , public FrameDestructionObserver
>@@ -313,6 +319,9 @@ public:
>     SimulatedMouseEventsDispatchPolicy simulatedMouseEventsDispatchPolicy() const { return m_simulatedMouseEventsDispatchPolicy; }
>     void setSimulatedMouseEventsDispatchPolicy(SimulatedMouseEventsDispatchPolicy policy) { m_simulatedMouseEventsDispatchPolicy = policy; }
> 
>+    LegacyOverflowScrollingTouchPolicy legacyOverflowScrollingTouchPolicy() const { return m_legacyOverflowScrollingTouchPolicy; }
>+    void setLegacyOverflowScrollingTouchPolicy(LegacyOverflowScrollingTouchPolicy policy) { m_legacyOverflowScrollingTouchPolicy = policy; }
>+
>     void addSubresourceLoader(ResourceLoader*);
>     void removeSubresourceLoader(LoadCompletionType, ResourceLoader*);
>     void addPlugInStreamLoader(ResourceLoader&);
>@@ -596,6 +605,7 @@ private:
>     MetaViewportPolicy m_metaViewportPolicy { MetaViewportPolicy::Default };
>     MediaSourcePolicy m_mediaSourcePolicy { MediaSourcePolicy::Default };
>     SimulatedMouseEventsDispatchPolicy m_simulatedMouseEventsDispatchPolicy { SimulatedMouseEventsDispatchPolicy::Default };
>+    LegacyOverflowScrollingTouchPolicy m_legacyOverflowScrollingTouchPolicy { LegacyOverflowScrollingTouchPolicy::Default };
> 
> #if ENABLE(SERVICE_WORKER)
>     Optional<ServiceWorkerRegistrationData> m_serviceWorkerRegistrationData;
>diff --git a/Source/WebKit/Shared/WebsiteLegacyOverflowScrollingTouchPolicy.h b/Source/WebKit/Shared/WebsiteLegacyOverflowScrollingTouchPolicy.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e0d26dd5fa526258a3217d6f0753609a12371473
>--- /dev/null
>+++ b/Source/WebKit/Shared/WebsiteLegacyOverflowScrollingTouchPolicy.h
>@@ -0,0 +1,51 @@
>+/*
>+ * 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. AND ITS CONTRIBUTORS ``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 ITS 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 <wtf/Forward.h>
>+
>+namespace WebKit {
>+
>+enum class WebsiteLegacyOverflowScrollingTouchPolicy : uint8_t {
>+    Default,
>+    Disable,
>+    Enable
>+};
>+
>+}
>+
>+namespace WTF {
>+
>+template<> struct EnumTraits<WebKit::WebsiteLegacyOverflowScrollingTouchPolicy> {
>+    using values = EnumValues<
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy,
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy::Default,
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy::Disable,
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy::Enable
>+    >;
>+};
>+
>+} // namespace WTF
>diff --git a/Source/WebKit/Shared/WebsitePoliciesData.cpp b/Source/WebKit/Shared/WebsitePoliciesData.cpp
>index f53776a911443574eeca573dc3abf62958191bd9..464b8940875b3281232a21724f8f5ebc0ef67d44 100644
>--- a/Source/WebKit/Shared/WebsitePoliciesData.cpp
>+++ b/Source/WebKit/Shared/WebsitePoliciesData.cpp
>@@ -52,6 +52,7 @@ void WebsitePoliciesData::encode(IPC::Encoder& encoder) const
>     encoder << metaViewportPolicy;
>     encoder << mediaSourcePolicy;
>     encoder << simulatedMouseEventsDispatchPolicy;
>+    encoder << legacyOverflowScrollingTouchPolicy;
> }
> 
> Optional<WebsitePoliciesData> WebsitePoliciesData::decode(IPC::Decoder& decoder)
>@@ -123,6 +124,11 @@ Optional<WebsitePoliciesData> WebsitePoliciesData::decode(IPC::Decoder& decoder)
>     if (!simulatedMouseEventsDispatchPolicy)
>         return WTF::nullopt;
> 
>+    Optional<WebsiteLegacyOverflowScrollingTouchPolicy> legacyOverflowScrollingTouchPolicy;
>+    decoder >> legacyOverflowScrollingTouchPolicy;
>+    if (!legacyOverflowScrollingTouchPolicy)
>+        return WTF::nullopt;
>+
>     return { {
>         WTFMove(*contentBlockersEnabled),
>         WTFMove(*allowedAutoplayQuirks),
>@@ -139,6 +145,7 @@ Optional<WebsitePoliciesData> WebsitePoliciesData::decode(IPC::Decoder& decoder)
>         WTFMove(*metaViewportPolicy),
>         WTFMove(*mediaSourcePolicy),
>         WTFMove(*simulatedMouseEventsDispatchPolicy),
>+        WTFMove(*legacyOverflowScrollingTouchPolicy),
>     } };
> }
> 
>@@ -237,6 +244,18 @@ void WebsitePoliciesData::applyToDocumentLoader(WebsitePoliciesData&& websitePol
>         break;
>     }
> 
>+    switch (websitePolicies.legacyOverflowScrollingTouchPolicy) {
>+    case WebsiteLegacyOverflowScrollingTouchPolicy::Default:
>+        documentLoader.setLegacyOverflowScrollingTouchPolicy(WebCore::LegacyOverflowScrollingTouchPolicy::Default);
>+        break;
>+    case WebsiteLegacyOverflowScrollingTouchPolicy::Disable:
>+        documentLoader.setLegacyOverflowScrollingTouchPolicy(WebCore::LegacyOverflowScrollingTouchPolicy::Disable);
>+        break;
>+    case WebsiteLegacyOverflowScrollingTouchPolicy::Enable:
>+        documentLoader.setLegacyOverflowScrollingTouchPolicy(WebCore::LegacyOverflowScrollingTouchPolicy::Enable);
>+        break;
>+    }
>+
>     if (websitePolicies.websiteDataStoreParameters) {
>         if (auto* frame = documentLoader.frame()) {
>             if (auto* page = frame->page())
>diff --git a/Source/WebKit/Shared/WebsitePoliciesData.h b/Source/WebKit/Shared/WebsitePoliciesData.h
>index 040bf0633e2d7146093755593affef0ac221be0b..98fc9910cf2f80a2b3cc1d06c0dae1a268c052f6 100644
>--- a/Source/WebKit/Shared/WebsitePoliciesData.h
>+++ b/Source/WebKit/Shared/WebsitePoliciesData.h
>@@ -28,6 +28,7 @@
> #include "WebsiteAutoplayPolicy.h"
> #include "WebsiteAutoplayQuirk.h"
> #include "WebsiteDataStoreParameters.h"
>+#include "WebsiteLegacyOverflowScrollingTouchPolicy.h"
> #include "WebsiteMediaSourcePolicy.h"
> #include "WebsiteMetaViewportPolicy.h"
> #include "WebsitePopUpPolicy.h"
>@@ -65,6 +66,7 @@ struct WebsitePoliciesData {
>     WebsiteMetaViewportPolicy metaViewportPolicy { WebsiteMetaViewportPolicy::Default };
>     WebsiteMediaSourcePolicy mediaSourcePolicy { WebsiteMediaSourcePolicy::Default };
>     WebsiteSimulatedMouseEventsDispatchPolicy simulatedMouseEventsDispatchPolicy { WebsiteSimulatedMouseEventsDispatchPolicy::Default };
>+    WebsiteLegacyOverflowScrollingTouchPolicy legacyOverflowScrollingTouchPolicy { WebsiteLegacyOverflowScrollingTouchPolicy::Default };
> 
>     void encode(IPC::Encoder&) const;
>     static Optional<WebsitePoliciesData> decode(IPC::Decoder&);
>diff --git a/Source/WebKit/UIProcess/API/APIWebsitePolicies.cpp b/Source/WebKit/UIProcess/API/APIWebsitePolicies.cpp
>index 5cfeb08b9d2a4faa6e780dc6b5e9757db34ed882..4437dd5b73c9c31d67705623cefba1d36e4d0d31 100644
>--- a/Source/WebKit/UIProcess/API/APIWebsitePolicies.cpp
>+++ b/Source/WebKit/UIProcess/API/APIWebsitePolicies.cpp
>@@ -61,6 +61,7 @@ Ref<WebsitePolicies> WebsitePolicies::copy() const
>     policies->setMetaViewportPolicy(m_metaViewportPolicy);
>     policies->setMediaSourcePolicy(m_mediaSourcePolicy);
>     policies->setSimulatedMouseEventsDispatchPolicy(m_simulatedMouseEventsDispatchPolicy);
>+    policies->setLegacyOverflowScrollingTouchPolicy(m_legacyOverflowScrollingTouchPolicy);
>     
>     Vector<WebCore::HTTPHeaderField> legacyCustomHeaderFields;
>     legacyCustomHeaderFields.reserveInitialCapacity(m_legacyCustomHeaderFields.size());
>@@ -113,6 +114,7 @@ WebKit::WebsitePoliciesData WebsitePolicies::data()
>         m_metaViewportPolicy,
>         m_mediaSourcePolicy,
>         m_simulatedMouseEventsDispatchPolicy,
>+        m_legacyOverflowScrollingTouchPolicy,
>     };
> }
> 
>diff --git a/Source/WebKit/UIProcess/API/APIWebsitePolicies.h b/Source/WebKit/UIProcess/API/APIWebsitePolicies.h
>index 50ff7aeff4a839184ce48b9d46633e32d51cee44..b79fab0b194b0539229b99ddf0c7d9e1ec677dca 100644
>--- a/Source/WebKit/UIProcess/API/APIWebsitePolicies.h
>+++ b/Source/WebKit/UIProcess/API/APIWebsitePolicies.h
>@@ -29,6 +29,7 @@
> #include "WebCompatibilityMode.h"
> #include "WebsiteAutoplayPolicy.h"
> #include "WebsiteAutoplayQuirk.h"
>+#include "WebsiteLegacyOverflowScrollingTouchPolicy.h"
> #include "WebsiteMediaSourcePolicy.h"
> #include "WebsiteMetaViewportPolicy.h"
> #include "WebsitePopUpPolicy.h"
>@@ -104,6 +105,9 @@ public:
>     WebKit::WebsiteSimulatedMouseEventsDispatchPolicy simulatedMouseEventsDispatchPolicy() const { return m_simulatedMouseEventsDispatchPolicy; }
>     void setSimulatedMouseEventsDispatchPolicy(WebKit::WebsiteSimulatedMouseEventsDispatchPolicy policy) { m_simulatedMouseEventsDispatchPolicy = policy; }
> 
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy legacyOverflowScrollingTouchPolicy() const { return m_legacyOverflowScrollingTouchPolicy; }
>+    void setLegacyOverflowScrollingTouchPolicy(WebKit::WebsiteLegacyOverflowScrollingTouchPolicy policy) { m_legacyOverflowScrollingTouchPolicy = policy; }
>+
>     bool allowSiteSpecificQuirksToOverrideCompatibilityMode() const { return m_allowSiteSpecificQuirksToOverrideCompatibilityMode; }
>     void setAllowSiteSpecificQuirksToOverrideCompatibilityMode(bool value) { m_allowSiteSpecificQuirksToOverrideCompatibilityMode = value; }
> 
>@@ -130,6 +134,7 @@ private:
>     WebKit::WebsiteMetaViewportPolicy m_metaViewportPolicy { WebKit::WebsiteMetaViewportPolicy::Default };
>     WebKit::WebsiteMediaSourcePolicy m_mediaSourcePolicy { WebKit::WebsiteMediaSourcePolicy::Default };
>     WebKit::WebsiteSimulatedMouseEventsDispatchPolicy m_simulatedMouseEventsDispatchPolicy { WebKit::WebsiteSimulatedMouseEventsDispatchPolicy::Default };
>+    WebKit::WebsiteLegacyOverflowScrollingTouchPolicy m_legacyOverflowScrollingTouchPolicy { WebKit::WebsiteLegacyOverflowScrollingTouchPolicy::Default };
>     bool m_allowSiteSpecificQuirksToOverrideCompatibilityMode { false };
>     WTF::String m_applicationNameForUserAgentWithModernCompatibility;
> };
>diff --git a/Source/WebKit/WebKit.xcodeproj/project.pbxproj b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
>index 17ecd2ef7f596d39163ac5aa99ab112702754693..1a7ca3238709da3cdc53ec5c6fd686da4d6720c4 100644
>--- a/Source/WebKit/WebKit.xcodeproj/project.pbxproj
>+++ b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
>@@ -1117,6 +1117,7 @@
> 		6BE969CB1E54D4CF008B7483 /* ResourceLoadStatisticsClassifierCocoa.h in Headers */ = {isa = PBXBuildFile; fileRef = 6BE969C91E54D4CF008B7483 /* ResourceLoadStatisticsClassifierCocoa.h */; };
> 		6BE969CD1E54E054008B7483 /* ResourceLoadStatisticsClassifier.h in Headers */ = {isa = PBXBuildFile; fileRef = 6BE969CC1E54E054008B7483 /* ResourceLoadStatisticsClassifier.h */; };
> 		6EE849C81368D9390038D481 /* WKInspectorPrivateMac.h in Headers */ = {isa = PBXBuildFile; fileRef = 6EE849C61368D92D0038D481 /* WKInspectorPrivateMac.h */; settings = {ATTRIBUTES = (Private, ); }; };
>+		711725A9228D564300018514 /* WebsiteLegacyOverflowScrollingTouchPolicy.h in Headers */ = {isa = PBXBuildFile; fileRef = 711725A8228D563A00018514 /* WebsiteLegacyOverflowScrollingTouchPolicy.h */; };
> 		71FB810B2260627E00323677 /* WebsiteSimulatedMouseEventsDispatchPolicy.h in Headers */ = {isa = PBXBuildFile; fileRef = 71FB810A2260627A00323677 /* WebsiteSimulatedMouseEventsDispatchPolicy.h */; };
> 		728E86F11795188C0087879E /* WebColorPickerMac.h in Headers */ = {isa = PBXBuildFile; fileRef = 728E86EF1795188C0087879E /* WebColorPickerMac.h */; };
> 		75A8D2C8187CCFAB00C39C9E /* WKWebsiteDataStore.h in Headers */ = {isa = PBXBuildFile; fileRef = 75A8D2C4187CCF9F00C39C9E /* WKWebsiteDataStore.h */; settings = {ATTRIBUTES = (Public, ); }; };
>@@ -3606,6 +3607,7 @@
> 		6BE969CC1E54E054008B7483 /* ResourceLoadStatisticsClassifier.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ResourceLoadStatisticsClassifier.h; sourceTree = "<group>"; };
> 		6D8A91A511F0EFD100DD01FE /* com.apple.WebProcess.sb.in */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = com.apple.WebProcess.sb.in; path = WebProcess/com.apple.WebProcess.sb.in; sourceTree = "<group>"; };
> 		6EE849C61368D92D0038D481 /* WKInspectorPrivateMac.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = WKInspectorPrivateMac.h; path = mac/WKInspectorPrivateMac.h; sourceTree = "<group>"; };
>+		711725A8228D563A00018514 /* WebsiteLegacyOverflowScrollingTouchPolicy.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebsiteLegacyOverflowScrollingTouchPolicy.h; sourceTree = "<group>"; };
> 		71FB810A2260627A00323677 /* WebsiteSimulatedMouseEventsDispatchPolicy.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebsiteSimulatedMouseEventsDispatchPolicy.h; sourceTree = "<group>"; };
> 		728E86EF1795188C0087879E /* WebColorPickerMac.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebColorPickerMac.h; sourceTree = "<group>"; };
> 		728E86F01795188C0087879E /* WebColorPickerMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WebColorPickerMac.mm; sourceTree = "<group>"; };
>@@ -5278,6 +5280,7 @@
> 				5C8DD3811FE455CA00F2A556 /* WebsiteAutoplayQuirk.h */,
> 				511F7D3F1EB1BCEE00E47B83 /* WebsiteDataStoreParameters.cpp */,
> 				511F7D401EB1BCEE00E47B83 /* WebsiteDataStoreParameters.h */,
>+				711725A8228D563A00018514 /* WebsiteLegacyOverflowScrollingTouchPolicy.h */,
> 				F4CB09E4225D5A0300891487 /* WebsiteMediaSourcePolicy.h */,
> 				F430E941224732A9005FE053 /* WebsiteMetaViewportPolicy.h */,
> 				5C3AEA8E1FE1F1DF002318D3 /* WebsitePoliciesData.cpp */,
>@@ -9772,6 +9775,7 @@
> 				1A4832D11A9BDC2F008B4DFE /* WebsiteDataRecord.h in Headers */,
> 				1A53C2AA1A325730004E8C70 /* WebsiteDataStore.h in Headers */,
> 				511F7D411EB1BCF500E47B83 /* WebsiteDataStoreParameters.h in Headers */,
>+				711725A9228D564300018514 /* WebsiteLegacyOverflowScrollingTouchPolicy.h in Headers */,
> 				F4CB09E5225D5A0900891487 /* WebsiteMediaSourcePolicy.h in Headers */,
> 				F430E9422247335F005FE053 /* WebsiteMetaViewportPolicy.h in Headers */,
> 				0EDE85032004E75D00030560 /* WebsitePopUpPolicy.h in Headers */,
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 9aa7bd16b5f979b9e41461fb68fc937007c1a1e5..daa371fd9bf5fd45eafad8e457b29ed48cebb378 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,16 @@
>+2019-05-17  Antoine Quint  <graouts@apple.com>
>+
>+        Add a website policy to disable the legacy -webkit-overflow-scrolling:touch behavior
>+        https://bugs.webkit.org/show_bug.cgi?id=197943
>+        <rdar://problem/49078202>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode-expected.html: Added.
>+        * fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode.html: Added.
>+        * platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode-expected.txt: Added.
>+        * platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode.html: Added.
>+
> 2019-05-16  Greg Doolittle  <gr3g@apple.com>
> 
>         AX: Unship some ARIA string reflectors that are to-be-replaced by element reflection
>diff --git a/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode-expected.html b/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode-expected.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..256b1d4d8716eb168e66a5330e1f86669dc605e0
>--- /dev/null
>+++ b/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode-expected.html
>@@ -0,0 +1,52 @@
>+<!DOCTYPE html> 
>+<html>
>+<head>
>+    <style>
>+        .box {
>+            position: absolute;
>+            height: 200px;
>+            width: 200px;
>+            background-color: blue;
>+        }
>+        
>+        .scroller {
>+            margin: 60px;
>+            overflow: scroll;
>+            border: 1px solid black;
>+            width: 220px;
>+            height: 220px;
>+        }
>+        
>+        .scrolled-contents {
>+            height: 1000px;
>+        }
>+        
>+        .outside {
>+            z-index: 1;
>+            top: 20px;
>+            left: 20px;
>+            background-color: green;
>+        }
>+        
>+        .back {
>+            z-index: 0;
>+        }
>+        
>+        .front {
>+            z-index: 2;
>+            top: 120px;
>+            left: 120px;
>+            background-color: orange;
>+        }
>+    </style>
>+</head>
>+<body>
>+    <div class="outside box"></div>
>+    <div class="scroller">
>+        <div class="scrolled-contents">
>+            <div class="back box"></div>
>+            <div class="front box"></div>
>+        </div>
>+    </div>
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode.html b/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..619b7e428c94045e0fe4720be88abdcf8899c238
>--- /dev/null
>+++ b/LayoutTests/fast/scrolling/ipad/overflow-scrolling-touch-enabled-stacking-modern-compatibility-mode.html
>@@ -0,0 +1,53 @@
>+<!DOCTYPE html> 
>+<html>
>+<head>
>+    <style>
>+        .box {
>+            position: absolute;
>+            height: 200px;
>+            width: 200px;
>+            background-color: blue;
>+        }
>+        
>+        .scroller {
>+            margin: 60px;
>+            overflow: scroll;
>+            border: 1px solid black;
>+            width: 220px;
>+            height: 220px;
>+            -webkit-overflow-scrolling: touch;
>+        }
>+        
>+        .scrolled-contents {
>+            height: 1000px;
>+        }
>+        
>+        .outside {
>+            z-index: 1;
>+            top: 20px;
>+            left: 20px;
>+            background-color: green;
>+        }
>+        
>+        .back {
>+            z-index: 0;
>+        }
>+        
>+        .front {
>+            z-index: 2;
>+            top: 120px;
>+            left: 120px;
>+            background-color: orange;
>+        }
>+    </style>
>+</head>
>+<body>
>+    <div class="outside box"></div>
>+    <div class="scroller">
>+        <div class="scrolled-contents">
>+            <div class="back box"></div>
>+            <div class="front box"></div>
>+        </div>
>+    </div>
>+</body>
>+</html>
>diff --git a/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode-expected.txt b/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..fc8636fa109fed2b0d0697e8fd9ce8d9f07153a4
>--- /dev/null
>+++ b/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode-expected.txt
>@@ -0,0 +1,12 @@
>+This tests checks parsing of the '-webkit-overflow-scrolling' property.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+PASS test("-webkit-overflow-scrolling: auto", "-webkit-overflow-scrolling") is ""
>+PASS test("-webkit-overflow-scrolling: banana", "-webkit-overflow-scrolling") is ""
>+PASS test("-webkit-overflow-scrolling: touch", "-webkit-overflow-scrolling") is ""
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode.html b/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..dfca2a1308fcba15cc2af3bdea0a7327dbeca24b
>--- /dev/null
>+++ b/LayoutTests/platform/ipad/fast/css/webkit-overflow-scrolling-parsing-modern-compatibility-mode.html
>@@ -0,0 +1,31 @@
>+<!DOCTYPE html> 
>+<html>
>+<head>
>+<script src="../../../../resources/js-test-pre.js"></script>
>+</head>
>+<body>
>+<p id="description"></p>
>+<div id="console"></div>
>+<script>
>+description("This tests checks parsing of the '-webkit-overflow-scrolling' property.");
>+
>+function test(declaration, property)
>+{
>+    var div = document.createElement("div");
>+    div.setAttribute("style", declaration);
>+    document.body.appendChild(div);
>+    
>+    var result = div.style.getPropertyValue(property);
>+    document.body.removeChild(div);
>+    return result;
>+}
>+
>+shouldBe('test("-webkit-overflow-scrolling: auto", "-webkit-overflow-scrolling")', '""');
>+shouldBe('test("-webkit-overflow-scrolling: banana", "-webkit-overflow-scrolling")', '""');
>+shouldBe('test("-webkit-overflow-scrolling: touch", "-webkit-overflow-scrolling")', '""');
>+
>+var successfullyParsed = true;
>+</script>
>+<script src="../../../../resources/js-test-post.js"></script>
>+</body>
>+</html>

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Attachments on bug 197943: 370033 | 370110 | 370113 | 370132 | 370133