Remove more oilpan.

sky/engine/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 28 matching lines @@
 namespace blink {
 
 class AnimationTimeline;
 class ExceptionState;
 
 class AnimationPlayer final : public RefCounted<AnimationPlayer>
     , public ActiveDOMObject
     , public EventTargetWithInlineData {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_EVENT_TARGET(AnimationPlayer);
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(AnimationPlayer);
 public:
     enum AnimationPlayState {
         Idle,
         Pending,
         Running,
         Paused,
         Finished
     };
 
     ~AnimationPlayer();
@@ skipping 152 matching lines @@
     // animation is started. Updated once the start time is known and each time
     // modifications are pushed to the compositor.
     OwnPtr<CompositorState> m_compositorState;
     bool m_compositorPending;
     bool m_currentTimePending;
 };
 
 } // namespace blink
 
 #endif