Oilpan: remove redundant WILL_BE_EAGERLY_TRACED() declarations.

Source/core/animation/AnimationPlayer.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 24 matching lines @@
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class AnimationTimeline;
 class ExceptionState;
 
-class AnimationPlayer;
-WILL_BE_EAGERLY_TRACED(AnimationPlayer);
-
 class AnimationPlayer final : public RefCountedWillBeGarbageCollectedFinalized<AnimationPlayer>
     , public ActiveDOMObject
     , public EventTargetWithInlineData {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_EVENT_TARGET(AnimationPlayer);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(AnimationPlayer);
 public:
     enum AnimationPlayState {
         Idle,
         Pending,
@@ skipping 191 matching lines @@
     OwnPtr<CompositorState> m_compositorState;
     bool m_compositorPending;
     int m_compositorGroup;
 
     bool m_currentTimePending;
 };
 
 } // namespace blink
 
 #endif // AnimationPlayer_h