Manage RequestAnimationFrameCallbacks with OwnPtrs instead of RefPtrs

Source/core/dom/RequestAnimationFrameCallback.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * 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 RequestAnimationFrameCallback_h
 #define RequestAnimationFrameCallback_h
 
-#include "wtf/RefCounted.h"
-
 namespace WebCore {
 
-class RequestAnimationFrameCallback : public RefCounted<RequestAnimationFrameCallback> {
+class RequestAnimationFrameCallback {
 public:
     virtual ~RequestAnimationFrameCallback() { }
     virtual bool handleEvent(double highResTimeMs) = 0;
 
     int m_id;
-    bool m_firedOrCancelled;
+    bool m_cancelled;
     bool m_useLegacyTimeBase;
 };
 
 }
 
 #endif // RequestAnimationFrameCallback_h