Implement Animation constructor

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 57 matching lines @@
   enum AnimationPlayState {
     kUnset,
     kIdle,
     kPending,
     kRunning,
     kPaused,
     kFinished
   };
 
   static Animation* Create(AnimationEffectReadOnly*, AnimationTimeline*);
+
+  // Web Animations API IDL constructors.
+  static Animation* Create(ExecutionContext*,
+                           AnimationEffectReadOnly*,
+                           ExceptionState&);
+  static Animation* Create(ExecutionContext*,
+                           AnimationEffectReadOnly*,
+                           AnimationTimeline*,
+                           ExceptionState&);
+
   ~Animation();
   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   //  infinity  - if this animation is no longer in effect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
@@ skipping 265 matching lines @@
 
   bool current_time_pending_;
   bool state_is_being_updated_;
 
   bool effect_suppressed_;
 };
 
 }  // namespace blink
 
 #endif  // Animation_h