[SPv2] Decomposite otherwise-compositable animations that paint nothing.

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 81a09f20bf0ed52beb3dc74f6368a3952090af90..3c7c2ae4495303d4fac45de29e9f142a3edff94a 100644
--- a/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
+++ b/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2
@@ -1331,19 +1331,17 @@ crbug.com/589265 svg/text/text-layout-crash.html [ Failure ]
 crbug.com/589265 virtual/threaded/animations/animated-filter-svg-element.html [ Failure ]
 
 
-# Some work remains to fully support composited animation and scrolling.
+# Some work remains to fully support composited animation.
 crbug.com/674317 transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
 crbug.com/674317 transitions/transition-end-event-destroy-iframe.html [ Timeout ]
 crbug.com/674317 virtual/threaded/animations/composited-filter-webkit-filter.html [ Failure ]
+crbug.com/674317 virtual/threaded/animations/composited-animation-independent-transform-cancel.html [ Failure ]
 crbug.com/674317 virtual/threaded/animations/compositor-independent-transform-cancel.html [ Failure ]
-crbug.com/692310 virtual/threaded/animations/sample-on-last-keyframe.html [ Timeout ]
 crbug.com/674317 virtual/threaded/animations/skew-notsequential-compositor.html [ Failure ]
 crbug.com/674317 virtual/threaded/animations/zoom-responsive-transform-animation.html [ Timeout ]
 crbug.com/674317 virtual/threaded/transitions/extra-transition.html [ Timeout ]
 crbug.com/674317 virtual/threaded/transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
-crbug.com/674317 virtual/threaded/transitions/opacity-transition-zindex.html [ Timeout ]

[wkorman, 2017/03/20 22:32:33]

alancutter@ -- are these tests (this and the one below marked as removed)
actually aiming to test composited behavior? I want to make sure they aren't
just passing now due to being de-composited even when compositing feature is
enabled if their purpose is explicitly to make sure they do composite when
feature is enabled. If that makes sense.

[alancutter (OOO until 2018), 2017/03/21 00:32:12]

Thanks for the prompt. Looks like this test does depend on running on the
compositor for the purpose of synchronising with CC. I suspect changing
waitForCompositor() to box.animate({transform: ['scale(0.5)', 'scale(0.5)']})
should get it composited again though the expectations will need rebaselining.

The other timeout expectation removals look fine to me.

[wkorman, 2017/03/24 19:24:54]

I double checked this and it is creating a compositor animation as-is in SPv2,
so we're good. I'm not sure why I thought it wasn't.

 crbug.com/674317 virtual/threaded/transitions/transition-end-event-destroy-iframe.html [ Timeout ]
-crbug.com/674317 virtual/threaded/transitions/unprefixed-transform.html [ Timeout ]
 
 # Compositor Worker logic has not yet been fully ported to SPv2.
 crbug.com/686897 virtual/threaded/fast/compositorworker/compositor-attribute-change-worker.html [ Timeout ]