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

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).
 
 Bug(none) accessibility/ [ Skip ]
 Bug(none) app_banner/ [ Skip ]
 Bug(none) battery-status/ [ Skip ]
 Bug(none) bindings/ [ Skip ]
 Bug(none) bluetooth/ [ Skip ]
 Bug(none) canvas/ [ Skip ]
@@ skipping 1327 matching lines @@
 
 # Some work remains to fully support composited animation and scrolling.
 crbug.com/702350 transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
 crbug.com/702350 virtual/threaded/transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
 crbug.com/702353 transitions/transition-end-event-destroy-iframe.html [ Timeout ]
 crbug.com/702353 virtual/threaded/transitions/transition-end-event-destroy-iframe.html [ Timeout ]
 crbug.com/702353 virtual/threaded/transitions/extra-transition.html [ Timeout ]
 crbug.com/702365 virtual/threaded/animations/composited-filter-webkit-filter.html [ Failure ]
 crbug.com/702370 virtual/threaded/animations/compositor-independent-transform-cancel.html [ Failure ]
 crbug.com/702379 virtual/threaded/animations/skew-notsequential-compositor.html [ Failure ]
-crbug.com/692310 virtual/threaded/animations/sample-on-last-keyframe.html [ Timeout ]
-crbug.com/692310 virtual/threaded/animations/zoom-responsive-transform-animation.html [ Timeout ]
-crbug.com/692310 virtual/threaded/transitions/opacity-transition-zindex.html [ Timeout ]
-crbug.com/692310 virtual/threaded/transitions/unprefixed-transform.html [ Timeout ]
+# Eight of the frames in the test below paint no content. In SPv2 we will never
+# composite animations that paint nothing. For now we mark this test as failing,
+# and can explore enhancing animation test infrastructure or other
+# approaches. http://crbug.com/692310#c12
+crbug.com/692310 virtual/threaded/animations/composited-animations-rotate-zero-degrees.html [ Failure ]
 
 # Compositor Worker logic has not yet been fully ported to SPv2.
 crbug.com/686897 virtual/threaded/fast/compositorworker/compositor-attribute-change-worker.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/compositor-proxy-disconnect-worker.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/visual-update.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/basic-plumbing-main-to-worker.html [ Crash Failure Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/basic-plumbing-worker-to-main.html [ Crash Failure Timeout ]
 
 # virtual/threaded variants of sub-directories and tests already skipped or marked as failing above.
 Bug(none) virtual/threaded/inspector/ [ Skip ]
 Bug(none) virtual/threaded/fast/scroll-behavior/ [ Skip ]
 Bug(none) virtual/threaded/compositing/visibility/layer-visible-content.html [ Failure ]
 Bug(none) virtual/threaded/compositing/visibility/overlays.html [ Failure Crash ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-image-layers-dynamic.html [ Crash Failure ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-image-layers.html [ Failure ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-simple-video-layer.html [ Failure ]
 Bug(none) virtual/threaded/compositing/webgl/webgl-reflection.html [ Failure ]
 Bug(none) virtual/threaded/printing/ [ Skip ]
 
 # Tests that fail after changes to border dash painting, due to antialiasing differences
 # and minor border radius clipping differences. Some SPv2 change is being ticked by the border
 # painting code.
 Bug(700530) fast/css/background-clip-values.html [ Failure ]
 Bug(700530) svg/text/small-fonts-in-html5.html [ Failure ]
 Bug(700530) compositing/overflow/paint-neg-z-order-descendants-into-scrolling-contents-layer.html [ Failure ]
 Bug(700530) fast/multicol/tall-content-in-inner-with-fixed-height.html [ Failure ]
 Bug(700530) compositing/geometry/abs-position-inside-opacity.html [ Failure ]
 Bug(700530) fast/forms/select-popup/popup-menu-appearance-zoom110.html [ Failure ]
 Bug(700530) fast/css3-text/css3-text-decoration/text-underline-position/text-underline-position-cjk.html [ Failure ]