Web Animations CSS: Start running animations on the compositor

Source/core/animation/css/CSSAnimations.h

Index: Source/core/animation/css/CSSAnimations.h
diff --git a/Source/core/animation/css/CSSAnimations.h b/Source/core/animation/css/CSSAnimations.h
index b0b7e2a11eec1cfd3ab7f2cf57cf107fc1c9ceda..3dcfc8f9ebce73cb0ad61ef966e056a8f60a8283 100644
--- a/Source/core/animation/css/CSSAnimations.h
+++ b/Source/core/animation/css/CSSAnimations.h
@@ -119,6 +119,8 @@ public:
     const AnimationEffect::CompositableValueMap& compositableValuesForTransitions() const { return m_compositableValuesForTransitions; }
     AnimationEffect::CompositableValueMap& compositableValuesForAnimations() { return m_compositableValuesForAnimations; }
 
+    bool hasPendingCandidatesForCompositorAnimation() const;
+
     bool isEmpty() const
     {
         return m_newAnimations.isEmpty()
@@ -164,6 +166,9 @@ public:
     void maybeApplyPendingUpdate(Element*);
     bool isEmpty() const { return m_animations.isEmpty() && m_transitions.isEmpty() && !m_pendingUpdate; }
     void cancel();
+
+    bool hasPendingCandidateForCompositorAnimation() const;
+
 private:
     // Note that a single animation name may map to multiple players due to
     // the way in which we split up animations with incomplete keyframes.