Remove tons of OILPAN.

sky/engine/core/events/AnimationEvent.h

 /*
  * Copyright (C) 2007, 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 45 matching lines @@
         return adoptRef(new AnimationEvent(type, initializer));
     }
 
     virtual ~AnimationEvent();
 
     const String& animationName() const;
     double elapsedTime() const;
 
     virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) override;
-
 private:
     AnimationEvent();
     AnimationEvent(const AtomicString& type, const String& animationName, double elapsedTime);
     AnimationEvent(const AtomicString&, const AnimationEventInit&);
 
     String m_animationName;
     double m_elapsedTime;
 };
 
 } // namespace blink
 
 #endif // AnimationEvent_h