Fire overflowchanged events at raf timing

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 954427f15ee6d31eea3a3c23386379b4ce00f410..315ea8da0fa6c48b571a05b132f49db865bbba9f 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -44,7 +44,6 @@ class FloatSize;
 class Frame;
 class KURL;
 class Node;
-class OverflowEvent;
 class Page;
 class RenderBox;
 class RenderEmbeddedObject;
@@ -207,10 +206,6 @@ public:
 
     void restoreScrollbar();
 
-    void suspendOverflowEvents();
-    void resumeOverflowEvents();
-    void scheduleOverflowEvent(PassRefPtr<OverflowEvent>);
-
     void postLayoutTimerFired(Timer<FrameView>*);
 
     bool wasScrolledByUser() const;
@@ -498,9 +493,6 @@ private:
     AtomicString m_mediaType;
     AtomicString m_mediaTypeWhenNotPrinting;
 
-    unsigned m_overflowEventSuspendCount;
-    Vector<RefPtr<OverflowEvent> > m_overflowEventQueue;
-
     bool m_overflowStatusDirty;
     bool m_horizontalOverflow;
     bool m_verticalOverflow;