Oilpan: Completely move core/animations/ to oilpan's heap

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 43 matching lines @@
 
     // 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; }
     // 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; }
 
-    typedef HashCountedSet<AnimationPlayer*> AnimationPlayerSet;
+    typedef WillBeHeapHashSet<RawPtrWillBeWeakMember<AnimationPlayer> > AnimationPlayerSet;

[dstockwell, 2014/04/15 05:02:43]

Is there a HeapHashCountedSet? Although we don't rely on the count yet we will
in the future.

(animations add players to this set, currently there is at most one animation
per player, but that will change in the future).

[haraken, 2014/04/15 05:03:56]

Not yet, and that means that we need to implement it. I'll ask erikcorry@.

     // AnimationPlayers which have animations targeting this element.
     const AnimationPlayerSet& players() const { return m_players; }
     AnimationPlayerSet& players() { return m_players; }
 
     bool isEmpty() const { return m_defaultStack.isEmpty() && m_cssAnimations.isEmpty(); }
 
     void cancelAnimationOnCompositor();
 
     void updateAnimationFlags(RenderStyle&);
     void setAnimationStyleChange(bool animationStyleChange) { m_animationStyleChange = animationStyleChange; }
 
     void trace(Visitor*);
 
 private:
     bool isAnimationStyleChange() const { return m_animationStyleChange; }
 
     AnimationStack m_defaultStack;
     CSSAnimations m_cssAnimations;
     AnimationPlayerSet m_players;
     bool m_animationStyleChange;
 
     // CSSAnimations checks if a style change is due to animation.
     friend class CSSAnimations;
 };
 
 } // namespace WebCore
 
 #endif