Revert 140571

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

 /*
  * Copyright (C) 2011 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 70 matching lines @@
     // Invalidating the scrolling tree will break the reference cycle between the ScrollingCoordinator and ScrollingTree objects.
     ScrollingThread::dispatch(bind(&ScrollingTree::invalidate, m_scrollingTree.release()));
 }
 
 ScrollingTree* ScrollingCoordinatorMac::scrollingTree() const
 {
     ASSERT(m_scrollingTree);
     return m_scrollingTree.get();
 }
 
-bool ScrollingCoordinatorMac::isRubberBandInProgress() const
-{
-    return scrollingTree()->isRubberBandInProgress();
-}
-
 void ScrollingCoordinatorMac::commitTreeStateIfNeeded()
 {
     if (!m_scrollingStateTree->hasChangedProperties())
         return;
 
     commitTreeState();
     m_scrollingStateTreeCommitterTimer.stop();
 }
 
 void ScrollingCoordinatorMac::frameViewLayoutUpdated(FrameView* frameView)
@@ skipping 379 matching lines @@
 }
 
 String ScrollingCoordinatorMac::scrollingStateTreeAsText() const
 {
     return m_scrollingStateTree->rootStateNode()->scrollingStateTreeAsText();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(THREADED_SCROLLING)