Use HeapHashCountedSet for AnimationPlayerCountedSet

Source/core/animation/ActiveAnimations.h

 /*
  * 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 26 matching lines @@
 #include "wtf/HashMap.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class CSSAnimations;
 class RenderObject;
 class Element;
 
-typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<AnimationPlayer>, int> AnimationPlayerCountedSet;
+typedef WillBeHeapHashCountedSet<RawPtrWillBeWeakMember<AnimationPlayer> > AnimationPlayerCountedSet;
 
 class ActiveAnimations : public NoBaseWillBeGarbageCollectedFinalized<ActiveAnimations> {
     WTF_MAKE_NONCOPYABLE(ActiveAnimations);
 public:
     ActiveAnimations()
         : m_animationStyleChange(false)
     {
     }
 
     ~ActiveAnimations();
 
     // Animations that are currently active for this element, their effects will be applied
     // during a style recalc. CSS Transitions are included in this stack.
     AnimationStack& defaultStack() { return m_defaultStack; }
     const AnimationStack& defaultStack() const { return m_defaultStack; }
     // Tracks the state of active CSS Animations and Transitions. The individual animations
     // will also be part of the default stack, but the mapping betwen animation name and
     // player is kept here.
     CSSAnimations& cssAnimations() { return m_cssAnimations; }
     const CSSAnimations& cssAnimations() const { return m_cssAnimations; }
 
     // AnimationPlayers which have animations targeting this element.
-    const AnimationPlayerCountedSet& players() const { return m_players; }
-    void addPlayer(AnimationPlayer*);
-    void removePlayer(AnimationPlayer*);
+    AnimationPlayerCountedSet& players() { return m_players; }
 
 #if ENABLE(OILPAN)
     bool isEmpty() const { return m_defaultStack.isEmpty() && m_cssAnimations.isEmpty(); }
 #else
     bool isEmpty() const { return m_defaultStack.isEmpty() && m_cssAnimations.isEmpty() && m_animations.isEmpty(); }
 #endif
 
     void cancelAnimationOnCompositor();
 
     void updateAnimationFlags(RenderStyle&);
@@ skipping 20 matching lines @@
     Vector<Animation*> m_animations;
 #endif
 
     // CSSAnimations checks if a style change is due to animation.
     friend class CSSAnimations;
 };
 
 } // namespace blink
 
 #endif