Safely finalize an AnimationTimeline's still-attached Animations.

third_party/WebKit/Source/core/animation/Animation.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 50 matching lines @@
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Animation);
 public:
     enum AnimationPlayState {
         Idle,
         Pending,
         Running,
         Paused,
         Finished
     };
 
+    static Animation* create(AnimationEffect*, AnimationTimeline*);
     ~Animation();
-    static Animation* create(AnimationEffect*, AnimationTimeline*);
+    void dispose();
 
     // Returns whether the animation is finished.
     bool update(TimingUpdateReason);
 
     // timeToEffectChange returns:
     //  infinity  - if this animation is no longer in effect
     //  0         - if this animation requires an update on the next frame
     //  n         - if this animation requires an update after 'n' units of time
     double timeToEffectChange();
 
@@ skipping 140 matching lines @@
     double m_endClip;
 
     unsigned m_sequenceNumber;
 
     typedef ScriptPromiseProperty<Member<Animation>, Member<Animation>, Member<DOMException>> AnimationPromise;
     Member<AnimationPromise> m_finishedPromise;
     Member<AnimationPromise> m_readyPromise;
 
     Member<AnimationEffect> m_content;
     Member<AnimationTimeline> m_timeline;
+
     // Reflects all pausing, including via pauseForTesting().
     bool m_paused;
     bool m_held;
     bool m_isPausedForTesting;
     bool m_isCompositedAnimationDisabledForTesting;
 
     // This indicates timing information relevant to the animation's effect
     // has changed by means other than the ordinary progression of time
     bool m_outdated;
 
@@ skipping 54 matching lines @@
 
     OwnPtr<WebCompositorAnimationPlayer> m_compositorPlayer;
 
     bool m_currentTimePending;
     bool m_stateIsBeingUpdated;
 };
 
 } // namespace blink
 
 #endif // Animation_h