rAF: Introduce FrameRequestCallbackCollection for managing rAF callbacks.

Source/core/inspector/InspectorInstrumentation.idl

Index: Source/core/inspector/InspectorInstrumentation.idl
diff --git a/Source/core/inspector/InspectorInstrumentation.idl b/Source/core/inspector/InspectorInstrumentation.idl
index ca9abbe9c1990275e97d1018f7e878a25a3a82dd..b2bdb440422a447356ff9430777458b645b5ccdc 100644
--- a/Source/core/inspector/InspectorInstrumentation.idl
+++ b/Source/core/inspector/InspectorInstrumentation.idl
@@ -339,13 +339,13 @@ interface InspectorInstrumentation {
     void willDestroyResource(Resource* cachedResource);
 
     [AsyncCallTracker, DOMDebugger]
-    void didRequestAnimationFrame([Keep] Document*, int callbackId);
+    void didRequestAnimationFrame([Keep] ExecutionContext*, int callbackId);
 
     [AsyncCallTracker, DOMDebugger]
-    void didCancelAnimationFrame([Keep] Document*, int callbackId);
+    void didCancelAnimationFrame([Keep] ExecutionContext*, int callbackId);
 
     [AsyncCallTracker, DOMDebugger]
-    InspectorInstrumentationCookie willFireAnimationFrame([Keep] Document*, int callbackId);
+    InspectorInstrumentationCookie willFireAnimationFrame([Keep] ExecutionContext*, int callbackId);
 
     [AsyncCallTracker, Inline=FastReturn]
     void didFireAnimationFrame(const InspectorInstrumentationCookie&);