Revert 140571

Source/WebCore/page/scrolling/mac/ScrollingCoordinatorMac.h

 /*
  * Copyright (C) 2012 Apple 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
@@ skipping 57 matching lines @@
     // These functions are used to indicate that a layer should be (or should not longer be) represented by a node
     // in the scrolling tree.
     virtual ScrollingNodeID attachToStateTree(ScrollingNodeType, ScrollingNodeID newNodeID, ScrollingNodeID parentID);
     virtual void detachFromStateTree(ScrollingNodeID);
 
     // This function wipes out the current tree.
     virtual void clearStateTree();
 
     virtual String scrollingStateTreeAsText() const OVERRIDE;
 
-    virtual bool isRubberBandInProgress() const OVERRIDE;
-
 private:
     // Return whether this scrolling coordinator can keep fixed position layers fixed to their
     // containers while scrolling.
     virtual bool supportsFixedPositionLayers() const OVERRIDE { return true; }
 
     // This function will update the ScrollingStateNode for the given viewport constrained object.
     virtual void updateViewportConstrainedNode(ScrollingNodeID, const ViewportConstraints&, GraphicsLayer*) OVERRIDE;
 
     virtual void updateScrollingNode(ScrollingNodeID, GraphicsLayer* scrollLayer, GraphicsLayer* counterScrollingLayer) OVERRIDE;
 
@@ skipping 46 matching lines @@
     Timer<ScrollingCoordinatorMac> m_scrollingStateTreeCommitterTimer;
 
     HashMap<ScrollingNodeID, ScrollingStateNode*> m_stateNodeMap;
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(THREADED_SCROLLING)
 
 #endif // ScrollingCoordinatorMac_h