Bug 215204

Description:
imported/w3c/web-platform-tests/svg/import/linking-a-10-f-manual.svg

This first instance of this showed up with the migration app-bound change in https://trac.webkit.org/changeset/265018/webkit which caused a constant failure.  Then when it wasreverted in https://trac.webkit.org/changeset/265037/webkit the test returned the test to constant pass.  

https://trac.webkit.org/changeset/265063/webkit has introduced a flaky failure with the test.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fsvg%2Fimport%2Flinking-a-10-f-manual.svg&platform=ios&flavor=wk2&limit=50000&style=release

Diff:
--- /Volumes/Data/worker/iOS-13-Simulator-WK2-Tests-EWS/build/layout-test-results/imported/w3c/web-platform-tests/svg/import/linking-a-10-f-manual-expected.txt
+++ /Volumes/Data/worker/iOS-13-Simulator-WK2-Tests-EWS/build/layout-test-results/imported/w3c/web-platform-tests/svg/import/linking-a-10-f-manual-actual.txt
@@ -1,43 +1,5 @@
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  RenderSVGRoot {svg} at (0,0) size 800x600
-    RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-    RenderSVGContainer {g} at (0,0) size 800x600
-      RenderSVGContainer {a} at (0,0) size 800x600
-        RenderSVGRect {rect} at (600,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=360.00] [y=0.00] [width=100.00] [height=100.00]
-        RenderSVGEllipse {ellipse} at (158,400) size 84x167 [fill={[type=SOLID] [color=#0000FF]}] [cx=120.00] [cy=290.00] [rx=25.00] [ry=50.00]
-        RenderSVGPath {line} at (529,414) size 108x155 [stroke={[type=SOLID] [color=#0000FF] [stroke width=5.00]}] [fill={[type=SOLID] [color=#000000]}] [x1=380.00] [y1=250.00] [x2=320.00] [y2=340.00]
-        RenderSVGPath {polygon} at (0,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [points="0 0 0 100 100 100 100 0"]
-        RenderSVGPath {path} at (416,416) size 101x168 [fill={[type=SOLID] [color=#0000FF]}] [data="M 280 250 L 250 350 L 310 330 Z"]
-        RenderSVGText {text} at (10,227) size 67x117 contains 1 chunk(s)
-          RenderSVGInlineText {#text} at (0,0) size 67x116
-            chunk 1 text run 1 at (10.00,320.00) startOffset 0 endOffset 1 width 66.63: "X"
-        RenderSVGImage {image} at (600,200) size 167x167
-        RenderSVGContainer {g} at (400,200) size 167x167
-          RenderSVGRect {rect} at (400,200) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=240.00] [y=120.00] [width=100.00] [height=100.00]
-        RenderSVGViewportContainer {svg} at (0,200) size 167x167
-          RenderSVGRect {rect} at (0,200) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=120.00] [width=100.00] [height=100.00]
-        RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-          RenderSVGRect {rect} at (0,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-          RenderSVGResourceLinearGradient {linearGradient} [id="testGradient"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
-            RenderSVGGradientStop {stop} [offset=1.00] [color=#0000FF]
-          RenderSVGHiddenContainer {symbol} at (0,0) size 0x0
-            RenderSVGEllipse {circle} at (0,0) size 134x134 [fill={[type=SOLID] [color=#0000FF]}] [cx=40.00] [cy=40.00] [r=40.00]
-          RenderSVGResourceMarker {marker} [id="testMarker"] [markerUnits=strokeWidth] [ref at (0,0)] [angle=0.00]
-            RenderSVGRect {rect} at (0,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-          RenderSVGResourcePattern {pattern} [id="testPattern"] [patternUnits=userSpaceOnUse] [patternContentUnits=userSpaceOnUse]
-            RenderSVGRect {rect} at (0,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-        RenderSVGContainer {use} at (200,0) size 167x167 [transform={m=((1.00,0.00)(0.00,1.00)) t=(120.00,0.00)}]
-          RenderSVGRect {rect} at (200,0) size 167x167 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-        RenderSVGRect {rect} at (200,200) size 167x167 [fill={[type=LINEAR-GRADIENT] [id="testGradient"]}] [x=120.00] [y=120.00] [width=100.00] [height=100.00]
-        RenderSVGContainer {use} at (650,416) size 134x134 [transform={m=((1.00,0.00)(0.00,1.00)) t=(390.00,250.00)}]
-          RenderSVGViewportContainer {svg} at (650,416) size 134x134
-            RenderSVGEllipse {circle} at (650,416) size 134x134 [fill={[type=SOLID] [color=#0000FF]}] [cx=40.00] [cy=40.00] [r=40.00]
-        RenderSVGPath {line} at (275,433) size 525x167 [fill={[type=SOLID] [color=#000000]}] [end marker=testMarker] [x1=150.00] [y1=260.00] [x2=165.00] [y2=260.00]
-        RenderSVGRect {rect} at (400,0) size 167x167 [fill={[type=PATTERN] [id="testPattern"]}] [x=240.00] [y=0.00] [width=100.00] [height=100.00]
-    RenderSVGContainer {g} at (16,516) size 385x64
-      RenderSVGText {text} at (10,310) size 231x38 contains 1 chunk(s)
-        RenderSVGInlineText {#text} at (0,0) size 231x38
-          chunk 1 text run 1 at (10.00,340.00) startOffset 0 endOffset 16 width 230.19: "$Revision: 1.4 $"
-    RenderSVGRect {rect} at (0,0) size 800x600 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=478.00] [height=358.00]
+  RenderBlock {HTML} at (0,0) size 800x600
+    RenderBody {BODY} at (8,8) size 784x584