Web Animations: Rename TimedItem to AnimationSource

Source/core/animation/AnimationTimeline.h

Index: Source/core/animation/AnimationTimeline.h
diff --git a/Source/core/animation/AnimationTimeline.h b/Source/core/animation/AnimationTimeline.h
index f731c22ba1fa04e01c917918e6af418a0f370aeb..389c90540ea4409a270f003c64f98dd67bb23fe0 100644
--- a/Source/core/animation/AnimationTimeline.h
+++ b/Source/core/animation/AnimationTimeline.h
@@ -44,7 +44,7 @@
 namespace WebCore {
 
 class Document;
-class TimedItem;
+class AnimationSource;
 
 // AnimationTimeline is constructed and owned by Document, and tied to its lifecycle.
 class AnimationTimeline : public RefCountedWillBeGarbageCollectedFinalized<AnimationTimeline> {
@@ -66,8 +66,8 @@ public:
     void serviceAnimations(TimingUpdateReason);
 
     // Creates a player attached to this timeline, but without a start time.
-    AnimationPlayer* createAnimationPlayer(TimedItem*);
-    AnimationPlayer* play(TimedItem*);
+    AnimationPlayer* createAnimationPlayer(AnimationSource*);
+    AnimationPlayer* play(AnimationSource*);
 
 #if !ENABLE(OILPAN)
     void playerDestroyed(AnimationPlayer* player)