SPv2: Use GeometryMapper to implement PaintLayerClipper.

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

 # Expectations for slimming paint v2
 # See: https://docs.google.com/document/d/1QCM912Dr6u38DqyQqd7pxQxDy8FFOoWMMDq7uAXqKdA/view
 # We are focused on fast/, compositing/, and svg/ with all other directories skipped (for now).
 
 accessibility/ [ Skip ]
 animations/ [ Skip ]
 app_banner/ [ Skip ]
 battery-status/ [ Skip ]
 bindings/ [ Skip ]
 bluetooth/ [ Skip ]
@@ skipping 2139 matching lines @@
 crbug.com/637316 svg/text/text-outline-rgba.html [ Failure ]
 crbug.com/637316 svg/text/text-path-middle-align.svg [ Failure ]
 
 fast/scrolling/overflow-scrollability.html [ Failure ]
 fast/scrolling/scrollbar-prevent-default.html [ Failure ]
 compositing/lots-of-img-layers-with-opacity.html [ Failure ]
 compositing/lots-of-img-layers.html [ Failure ]
 
 fast/events/overflow-composited-scroll-fake-mouse-move.html [ Skip ]
 
-# These timeout due to a JS errr parsing layerTreeAsText
-crbug.com/647831 compositing/overflow/ancestor-with-clip-path.html [ Failure ]
-crbug.com/647831 compositing/overflow/opt-in-if-composited.html [ Failure ]
-crbug.com/647831 compositing/overflow/descendant-with-clip-path.html [ Failure ]
-crbug.com/647831 compositing/overflow/scroller-with-border-radius.html [ Failure ]
+#The following tests for crbug.com/593596 are actually SPv2 progressions.
+# Small pixel differences, needs rebaseline
+crbug.com/593596 compositing/geometry/layer-due-to-layer-children-deep.html [ Failure ]

[Xianzhu, 2016/10/06 00:13:32]

You can also mark them NeedsRebaseline.

[chrishtr, 2016/10/06 17:11:08]

I can't do that without breaking SPv1 expectations or adding them to
virtual/spv2, no?

[Xianzhu, 2016/10/06 17:26:19]

The NeedsRebaseline won't cause real rebaseline until the expectations are
merged into the main TestExpectations. It seems better than Failure because it
states the actual result is valid, while Failure states we need to fix it.

[chrishtr, 2016/10/06 17:28:04]

Good point. Done.

+# These fail because GeometryMapper applies a control clip for the input element; SPv1 does not.
+crbug.com/593596 fast/css/input-search-padding.html [ Failure ]
+crbug.com/593596 fast/forms/search/search-vertical-alignment.html [ Failure ]
+fast/forms/search/searchfield-heights.html [ Failure ]
+fast/forms/search/searchfield-heights.html [ Failure ]
+fast/forms/text/text-font-height-mismatch.html [ Failure ]
+fast/forms/text/textfield-overflow-by-value-update.html [ Failure ]
+fast/replaced/width100percent-searchfield.html [ Failure ]
+# SPv2 correctly positions a background clip that includes the transformed size of div #two.
+# SPv1 does not understand how to apply transforms properly in PaintLayerClipper (the altter isue is
+# also tracked in crbug.com/548184).
+fast/transforms/transform-overflow.html [ Failure ]