Revert "Revert "Move some scroll invalidations to the paint invalidation phase""

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 09f5abeb11dbb6e587fdea0efa5181494fd2dbb9..dffc6f79fa8f9ec0e1199240eb2218c26f5f2bbd 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -320,7 +320,6 @@ public:
     virtual GraphicsLayer* layerForScrollCorner() const OVERRIDE;
 
 protected:
-    virtual void scrollContentsIfNeeded();
     virtual bool scrollContentsFastPath(const IntSize& scrollDelta) OVERRIDE;
     virtual void scrollContentsSlowPath(const IntRect& updateRect) OVERRIDE;
 
@@ -385,7 +384,6 @@ private:
     void didScrollTimerFired(Timer<FrameView>*);
 
     void updateLayersAndCompositingAfterScrollIfNeeded();
-    void updateFixedElementPaintInvalidationRectsAfterScroll();
     void updateCompositedSelectionBoundsIfNeeded();
 
     bool hasCustomScrollbars() const;