Bug 1049975 - Part 2: Make effect writable in Animation.webidl. r=smaug

MozReview-Commit-ID: HB4iWPXGkou

--HG--
extra : rebase_source : a2c5053aeb25872af66ea9b609b0ac05cdf96c85

dom/animation/Animation.h

@@ -98,6 +98,10 @@ public:
   void GetId(nsAString& aResult) const { aResult = mId; }
   void SetId(const nsAString& aId);
   KeyframeEffectReadOnly* GetEffect() const { return mEffect; }
+  void SetEffect(AnimationEffectReadOnly* aEffect)
+  {
+    // TODO: Merged with SetEffect(KeyframeEffectReadOnly*) in the next patch.
+  }
   void SetEffect(KeyframeEffectReadOnly* aEffect);
   AnimationTimeline* GetTimeline() const { return mTimeline; }
   void SetTimeline(AnimationTimeline* aTimeline);

dom/webidl/Animation.webidl

@@ -17,9 +17,8 @@ enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
               optional AnimationTimeline? timeline)]
 interface Animation : EventTarget {
   attribute DOMString id;
-  // Bug 1049975: Make 'effect' writeable
   [Func="nsDocument::IsWebAnimationsEnabled", Pure]
-  readonly attribute AnimationEffectReadOnly? effect;
+  attribute AnimationEffectReadOnly? effect;
   [Func="nsDocument::IsWebAnimationsEnabled"]
   attribute AnimationTimeline? timeline;
   [BinaryName="startTimeAsDouble"]