Web Animations CSS: Start running animations on the compositor

Source/core/animation/Animation.h

Index: Source/core/animation/Animation.h
diff --git a/Source/core/animation/Animation.h b/Source/core/animation/Animation.h
index 0940b3fe6e246c3325a070cd8a066871dfd18249..1fa6e4fb261e119ccb68c6f86738af9648ae8a14 100644
--- a/Source/core/animation/Animation.h
+++ b/Source/core/animation/Animation.h
@@ -45,6 +45,7 @@ public:
     enum Priority { DefaultPriority, TransitionPriority };
 
     static PassRefPtr<Animation> create(PassRefPtr<Element>, PassRefPtr<AnimationEffect>, const Timing&, Priority = DefaultPriority, PassOwnPtr<EventDelegate> = nullptr);
+    virtual bool isAnimation() OVERRIDE FINAL { return true; }
 
     const AnimationEffect::CompositableValueMap* compositableValues() const
     {
@@ -52,9 +53,15 @@ public:
         return m_compositableValues.get();
     }
 
+    bool affects(CSSPropertyID property) const;
     const AnimationEffect* effect() const { return m_effect.get(); }
     Priority priority() const { return m_priority; }
 
+    bool isCandidateForCompositorAnimation() const;
+    bool startCompositorAnimations();

[shans, 2013/11/18 01:02:06]

startOnCompositor?

[dstockwell, 2013/11/18 05:30:34]

Sounds good, but let's defer renaming until the end or after review.

+    bool isRunningCompositorAnimation(const Element* = 0, CSSPropertyID = CSSPropertyInvalid) const;

[shans, 2013/11/18 01:02:06]

isRunningOnCompositor?

[dstockwell, 2013/11/18 05:30:34]

Sounds good, but let's defer renaming until the end or after review.

+    void cancelCompositorAnimations();

[shans, 2013/11/18 01:02:06]

Some comments about when these can be called would be good. For example, it
seems like it's fine to speculatively call cancel, but one is expected to call
start only once.

[dstockwell, 2013/11/18 05:30:34]

Done.

+
 protected:
     // Returns whether style recalc was triggered.
     virtual bool applyEffects(bool previouslyInEffect);
@@ -74,8 +81,16 @@ private:
     OwnPtr<AnimationEffect::CompositableValueMap> m_compositableValues;
 
     Priority m_priority;
+
+    Vector<int> m_acceleratedAnimationIds;
 };
 
+inline Animation* toAnimation(TimedItem* timedItem)
+{
+    ASSERT_WITH_SECURITY_IMPLICATION(timedItem && timedItem->isAnimation());
+    return static_cast<Animation*>(timedItem);
+}
+
 } // namespace WebCore
 
 #endif