Remove tons of OILPAN.

sky/engine/core/events/AnimationPlayerEvent.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AnimationPlayerEvent_h
 #define AnimationPlayerEvent_h
 
 #include "core/events/Event.h"
 
 namespace blink {
@@ skipping 21 matching lines @@
         return adoptRef(new AnimationPlayerEvent(type, initializer));
     }
 
     virtual ~AnimationPlayerEvent();
 
     double currentTime() const;
     double timelineTime() const;
 
     virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) override;
-
 private:
     AnimationPlayerEvent();
     AnimationPlayerEvent(const AtomicString& type, double currentTime, double timelineTime);
     AnimationPlayerEvent(const AtomicString&, const AnimationPlayerEventInit&);
 
     double m_currentTime;
     double m_timelineTime;
 };
 
 } // namespace blink
 
 #endif // AnimationPlayerEvent_h