Implement merging non-composited paint property nodes in the PACompositor.

third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2

Index: third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
diff --git a/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2 b/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
index b7f2a11ee002a72f8cc686312e0763840e8a727b..c24abe402422da4186ec15da0afde8273b44b7d7 100644
--- a/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
+++ b/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
@@ -538,6 +538,7 @@ Bug(none) fast/canvas/alpha.html [ Failure ]
 Bug(none) fast/canvas/canvas-composite-video.html [ Failure ]
 Bug(none) fast/canvas/canvas-css-clip-path.html [ Failure ]
 Bug(none) fast/canvas/webgl/pixelated.html [ Failure ]
+crbug.com/668342 fast/clip/010.html [ Failure ]
 Bug(none) fast/clip/nestedTransparencyClip.html [ Failure ]
 Bug(none) fast/clip/outline-overflowClip.html [ Failure ]
 Bug(none) fast/clip/overflow-border-radius-clip.html [ Failure ]
@@ -1247,6 +1248,7 @@ Bug(none) svg/custom/grayscale-gradient-mask-2.svg [ Failure ]
 Bug(none) svg/custom/grayscale-gradient-mask.svg [ Failure ]
 Bug(none) svg/custom/group-opacity.svg [ Failure ]
 Bug(none) svg/custom/image-with-preserveAspectRatio-none.html [ Failure ]
+Bug(none) svg/custom/image-with-transform-clip-filter.svg [ Failure ]
 Bug(none) svg/custom/inline-svg-in-xhtml.xml [ Failure ]
 Bug(none) svg/custom/invalid-css.svg [ Failure ]
 Bug(none) svg/custom/invalid-stroke-hex.svg [ Failure ]
@@ -1335,6 +1337,7 @@ Bug(none) svg/custom/use-referencing-nonexisting-symbol.svg [ Failure ]
 Bug(none) svg/custom/use-transform.svg [ Failure ]
 Bug(none) svg/custom/viewBox-hit.svg [ Failure ]
 Bug(none) svg/custom/viewbox-syntax.svg [ Failure ]
+Bug(none) svg/custom/viewport-clippath-invalidation.html [ Failure ]
 Bug(none) svg/custom/visibility-override-clip.svg [ Failure ]
 Bug(none) svg/custom/visibility-override-mask.svg [ Failure ]
 Bug(none) svg/custom/visited-link-color.svg [ Failure ]
@@ -2206,3 +2209,12 @@ crbug.com/589279 css3/blending/background-blend-mode-data-uri-svg-image.html [ F
 # SPv1 does not understand how to apply transforms properly in PaintLayerClipper (the issue is
 # also tracked in crbug.com/548184).
 # transforms/transform-overflow.html
+
+# Subpixel adjustments due to differences in compositing
+crbug.com/668342 fast/pagination/auto-height-with-break.html [ Failure ]
+crbug.com/668342 svg/custom/non-scaling-stroke-update.svg [ Failure ]
+crbug.com/668342 fast/css/transform-default-parameter.html [ Failure ]
+crbug.com/668342 svg/custom/use-css-events.svg [ Failure ]
+crbug.com/668342 svg/text/text-layout-crash.html [ Failure ]
+crbug.com/668342 fast/multicol/span/invalid-spanner-in-transform.html [ Failure ]
+crbug.com/668342 images/color-profile-iframe.html [ Failure ]