Web Animations CSS: Start running animations on the compositor

Source/core/animation/ActiveAnimations.h

Index: Source/core/animation/ActiveAnimations.h
diff --git a/Source/core/animation/ActiveAnimations.h b/Source/core/animation/ActiveAnimations.h
index 58d4287950208736e5283db10df02fb113d18fca..ad52462c67958f5ed3dcd4c19238018fb335efe9 100644
--- a/Source/core/animation/ActiveAnimations.h
+++ b/Source/core/animation/ActiveAnimations.h
@@ -40,6 +40,12 @@
 
 namespace WebCore {
 
+class RenderObject;
+class Element;
+
+bool isRunningAnimation(const RenderObject&, CSSPropertyID = CSSPropertyInvalid);
+bool isRunningCompositorAnimation(const RenderObject&, CSSPropertyID = CSSPropertyInvalid);
+
 class ActiveAnimations {
 public:
     // Animations that are currently active for this element, their effects will be applied
@@ -56,6 +62,12 @@ public:
     PlayerSet& players() { return m_players; }
 
     bool isEmpty() const { return m_defaultStack.isEmpty() && m_cssAnimations.isEmpty(); }
+
+    bool hasCandidateForCompositorAnimation() const;
+    bool isRunningAnimation(CSSPropertyID) const;
+    bool isRunningCompositorAnimation(const Element*, CSSPropertyID) const;
+    void cancelCompositorAnimations();
+
 private:
     AnimationStack m_defaultStack;
     CSSAnimations m_cssAnimations;