rAF: Introduce FrameRequestCallbackCollection for managing rAF callbacks.

Source/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 125 matching lines @@
     void scrollTo(double x, double y) const override;
     void scrollTo(const ScrollToOptions&) const override;
 
     void moveBy(int x, int y, bool hasX, bool hasY) const override;
     void moveTo(int x, int y, bool hasX, bool hasY) const override;
     void resizeBy(int x, int y, bool hasX, bool hasY) const override;
     void resizeTo(int width, int height, bool hasWidth, bool hasHeight) const override;
     PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&) override;
     PassRefPtrWillBeRawPtr<CSSStyleDeclaration> getComputedStyle(Element*, const String& pseudoElt) const override;
     PassRefPtrWillBeRawPtr<CSSRuleList> getMatchedCSSRules(Element*, const String& pseudoElt) const override;
-    int requestAnimationFrame(RequestAnimationFrameCallback*) override;
-    int webkitRequestAnimationFrame(RequestAnimationFrameCallback*) override;
+    int requestAnimationFrame(FrameRequestCallback*) override;
+    int webkitRequestAnimationFrame(FrameRequestCallback*) override;
     void cancelAnimationFrame(int id) override;
     void schedulePostMessage(PassRefPtrWillBeRawPtr<MessageEvent>, LocalDOMWindow* source, SecurityOrigin* target, PassRefPtrWillBeRawPtr<ScriptCallStack> stackTrace);
     String crossDomainAccessErrorMessage(LocalDOMWindow* callingWindow) override;
     String sanitizedCrossDomainAccessErrorMessage(LocalDOMWindow* callingWindow) override;
 
     void registerProperty(DOMWindowProperty*);
     void unregisterProperty(DOMWindowProperty*);
 
     void reset();
 
@@ skipping 136 matching lines @@
 }
 
 inline String LocalDOMWindow::defaultStatus() const
 {
     return m_defaultStatus;
 }
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h