Oilpan: adjust AnimationTimeline finalization.

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 104 matching lines @@
     virtual bool hasPendingActivity() const override;
     virtual void stop() override;
     virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
     double playbackRate() const;
     void setPlaybackRate(double);
     const AnimationTimeline* timeline() const { return m_timeline; }
     AnimationTimeline* timeline() { return m_timeline; }
 
 #if !ENABLE(OILPAN)
-    void timelineDestroyed() { m_timeline = nullptr; }
+    void detachFromTimeline();
 #endif
 
     double calculateStartTime(double currentTime) const;
     bool hasStartTime() const { return !isNull(m_startTime); }
     double startTime(bool& isNull) const;
     double startTime() const;
     double startTimeInternal() const { return m_startTime; }
     void setStartTime(double);
     void setStartTimeInternal(double);
 
@@ skipping 143 matching lines @@
 
     OwnPtr<WebCompositorAnimationPlayer> m_compositorPlayer;
 
     bool m_currentTimePending;
     bool m_stateIsBeingUpdated;
 };
 
 } // namespace blink
 
 #endif // AnimationPlayer_h