Support compositing for active 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 24 matching lines @@
 #include "core/animation/KeyframeEffectModel.h"
 #include "core/animation/animatable/AnimatableDouble.h"
 #include "core/animation/animatable/AnimatableFilterOperations.h"
 #include "core/animation/animatable/AnimatableTransform.h"
 #include "core/animation/animatable/AnimatableValue.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/compositing/CompositedLayerMapping.h"
 #include "core/paint/FilterEffectBuilder.h"
+#include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/animation/AnimationTranslationUtil.h"
 #include "platform/animation/CompositorAnimation.h"
 #include "platform/animation/CompositorAnimationPlayer.h"
 #include "platform/animation/CompositorFilterAnimationCurve.h"
 #include "platform/animation/CompositorFilterKeyframe.h"
 #include "platform/animation/CompositorFloatAnimationCurve.h"
 #include "platform/animation/CompositorFloatKeyframe.h"
 #include "platform/animation/CompositorTransformAnimationCurve.h"
 #include "platform/animation/CompositorTransformKeyframe.h"
@@ skipping 282 matching lines @@
         (affectsBackdropFilter &&
          attachedAnimation->affects(targetElement, CSSPropertyBackdropFilter)))
       attachedAnimation->cancelAnimationOnCompositor();
   }
 }
 
 bool CompositorAnimations::canStartAnimationOnCompositor(
     const Element& element) {
   if (!Platform::current()->isThreadedAnimationEnabled())
     return false;
+
+  if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
+    // TODO(wkorman): Consider effect node for opacity.

[wkorman, 2016/12/15 23:06:00]

Are you adding direct compositing reasons to effect node, or should I do it?

[chrishtr, 2016/12/16 00:31:06]

You can add it. Follow the lead of the other patch and mimic the reasons
computed in CompositingReasonsFinder.

[wkorman, 2016/12/16 23:08:00]

Will do in subsequent change.

+    const TransformPaintPropertyNode* transformNode =
+        element.layoutObject()->paintProperties()->transform();
+    return transformNode && transformNode->hasDirectCompositingReasons();
+  }
+
   return element.layoutObject() &&
          element.layoutObject()->compositingState() == PaintsIntoOwnBacking;
 }
 
 void CompositorAnimations::startAnimationOnCompositor(
     const Element& element,
     int group,
     double startTime,
     double timeOffset,
     const Timing& timing,
@@ skipping 259 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