Remove tons of OILPAN.

sky/engine/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 61 matching lines @@
     bool isEmpty() const { return m_defaultStack.isEmpty() && m_cssAnimations.isEmpty() && m_players.isEmpty(); }
 
     void cancelAnimationOnCompositor();
 
     void updateAnimationFlags(RenderStyle&);
     void setAnimationStyleChange(bool animationStyleChange) { m_animationStyleChange = animationStyleChange; }
 
     void addAnimation(Animation* animation) { m_animations.append(animation); }
     void notifyAnimationDestroyed(Animation* animation) { m_animations.remove(m_animations.find(animation)); }
 
-    void trace(Visitor*);
-
 private:
     bool isAnimationStyleChange() const { return m_animationStyleChange; }
 
     AnimationStack m_defaultStack;
     CSSAnimations m_cssAnimations;
     AnimationPlayerCountedSet m_players;
     bool m_animationStyleChange;
 
     // This is to avoid a reference cycle that keeps Elements alive.
     Vector<Animation*> m_animations;
 
     // CSSAnimations checks if a style change is due to animation.
     friend class CSSAnimations;
 };
 
 } // namespace blink
 
 #endif