Safely finalize an AnimationTimeline's still-attached Animations.

third_party/WebKit/Source/core/animation/Animation.h

Index: third_party/WebKit/Source/core/animation/Animation.h
diff --git a/third_party/WebKit/Source/core/animation/Animation.h b/third_party/WebKit/Source/core/animation/Animation.h
index c2a2e8aa6f96e23b69730a0927ca230bdb10ed12..402df1adf5216b8d225aca9c793dfeeb4ab10acf 100644
--- a/third_party/WebKit/Source/core/animation/Animation.h
+++ b/third_party/WebKit/Source/core/animation/Animation.h
@@ -68,8 +68,9 @@ public:
         Finished
     };
 
-    ~Animation();
     static Animation* create(AnimationEffect*, AnimationTimeline*);
+    ~Animation();
+    void dispose();
 
     // Returns whether the animation is finished.
     bool update(TimingUpdateReason);
@@ -230,6 +231,7 @@ private:
 
     Member<AnimationEffect> m_content;
     Member<AnimationTimeline> m_timeline;
+
     // Reflects all pausing, including via pauseForTesting().
     bool m_paused;
     bool m_held;