Create compositor animations for effect animations in SPv2.

third_party/WebKit/Source/core/animation/CompositorAnimations.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 329 matching lines @@
       attachedAnimation->cancelAnimationOnCompositor();
   }
 }
 
 bool CompositorAnimations::canStartAnimationOnCompositor(
     const Element& element) {
   if (!Platform::current()->isThreadedAnimationEnabled())
     return false;
 
   if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
-    // TODO(wkorman): Consider effect node for opacity.
+    // We query paint property tree state below to determine whether the
+    // animation is compositable. There is a known lifecycle violation where an
+    // animation can be cancelled during style update. See
+    // CompositorAnimations::cancelAnimationOnCompositor and
+    // http://crbug.com/676456. When this is fixed we would like to enable
+    // the DCHECK below.
+    // DCHECK(document().lifecycle().state() >=
+    // DocumentLifecycle::PrePaintClean);
+    const ObjectPaintProperties* paintProperties =
+        element.layoutObject()->paintProperties();
     const TransformPaintPropertyNode* transformNode =
-        element.layoutObject()->paintProperties()->transform();
-    return transformNode && transformNode->hasDirectCompositingReasons();
+        paintProperties->transform();
+    const EffectPaintPropertyNode* effectNode = paintProperties->effect();
+    return (transformNode && transformNode->hasDirectCompositingReasons()) ||
+           (effectNode && effectNode->hasDirectCompositingReasons());
   }
 
   return element.layoutObject() &&
          element.layoutObject()->compositingState() == PaintsIntoOwnBacking;
 }
 
 void CompositorAnimations::startAnimationOnCompositor(
     const Element& element,
     int group,
     double startTime,
@@ skipping 261 matching lines @@
     animation->setTimeOffset(compositorTiming.scaledTimeOffset);
     animation->setDirection(compositorTiming.direction);
     animation->setPlaybackRate(compositorTiming.playbackRate);
     animation->setFillMode(compositorTiming.fillMode);
     animations.push_back(std::move(animation));
   }
   DCHECK(!animations.isEmpty());
 }
 
 }  // namespace blink