Manage RequestAnimationFrameCallbacks with OwnPtrs instead of RefPtrs

Source/core/dom/RequestAnimationFrameCallback.h

Index: Source/core/dom/RequestAnimationFrameCallback.h
diff --git a/Source/core/dom/RequestAnimationFrameCallback.h b/Source/core/dom/RequestAnimationFrameCallback.h
index 768e4a167ae8ee5ef01ae08bf305d9d67ee32f17..d2b212bb8147cc83ebb60749b11c0ea57a8f9601 100644
--- a/Source/core/dom/RequestAnimationFrameCallback.h
+++ b/Source/core/dom/RequestAnimationFrameCallback.h
@@ -31,17 +31,15 @@
 #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;
 };