rAF: Introduce FrameRequestCallbackCollection for managing rAF callbacks.

Source/core/dom/ScriptedAnimationController.h

 /*
  * Copyright (C) 2011 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  *  THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  *  DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  *  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
 #ifndef ScriptedAnimationController_h
 #define ScriptedAnimationController_h
 
+#include "core/dom/RequestAnimationFrameCallbackCollection.h"
 #include "platform/heap/Handle.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/StringImpl.h"
 
 namespace blink {
 
@@ skipping 30 matching lines @@
     void dispatchEventsAndCallbacksForPrinting();
 private:
     explicit ScriptedAnimationController(Document*);
 
     void scheduleAnimationIfNeeded();
 
     void dispatchEvents(const AtomicString& eventInterfaceFilter = AtomicString());
     void executeCallbacks(double monotonicTimeNow);
     void callMediaQueryListListeners();
 
-    typedef PersistentHeapVectorWillBeHeapVector<Member<RequestAnimationFrameCallback>> CallbackList;
-    CallbackList m_callbacks;
-    CallbackList m_callbacksToInvoke; // only non-empty while inside executeCallbacks
-
     RawPtrWillBeMember<Document> m_document;
-    CallbackId m_nextCallbackId;
+    RequestAnimationFrameCallbackCollection m_callbackCollection;
     int m_suspendCount;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_eventQueue;
     WillBeHeapListHashSet<std::pair<RawPtrWillBeMember<const EventTarget>, const StringImpl*>> m_perFrameEvents;
     typedef WillBeHeapListHashSet<RefPtrWillBeMember<MediaQueryListListener>> MediaQueryListListeners;
     MediaQueryListListeners m_mediaQueryListListeners;
 };
 
 } // namespace blink
 
 #endif // ScriptedAnimationController_h