Revert 140571

Source/WebCore/page/scrolling/ScrollingTree.cpp

 /*
  * 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 35 matching lines @@
     return adoptRef(new ScrollingTree(scrollingCoordinator));
 }
 
 ScrollingTree::ScrollingTree(ScrollingCoordinator* scrollingCoordinator)
     : m_scrollingCoordinator(scrollingCoordinator)
     , m_hasWheelEventHandlers(false)
     , m_canGoBack(false)
     , m_canGoForward(false)
     , m_mainFramePinnedToTheLeft(false)
     , m_mainFramePinnedToTheRight(false)
-    , m_mainFrameIsRubberBanding(false)
     , m_scrollingPerformanceLoggingEnabled(false)
     , m_isHandlingProgrammaticScroll(false)
 {
 }
 
 ScrollingTree::~ScrollingTree()
 {
     ASSERT(!m_scrollingCoordinator);
 }
 
@@ skipping 189 matching lines @@
     return m_canGoBack;
 }
 
 bool ScrollingTree::canGoForward()
 {
     MutexLocker lock(m_swipeStateMutex);
 
     return m_canGoForward;
 }
 
-bool ScrollingTree::isRubberBandInProgress()
-{
-    MutexLocker lock(m_mutex);    
-
-    return m_mainFrameIsRubberBanding;
-}
-
-void ScrollingTree::setMainFrameIsRubberBanding(bool isRubberBanding)
-{
-    MutexLocker locker(m_mutex);
-
-    m_mainFrameIsRubberBanding = isRubberBanding;
-}
-
 bool ScrollingTree::willWheelEventStartSwipeGesture(const PlatformWheelEvent& wheelEvent)
 {
     if (wheelEvent.phase() != PlatformWheelEventPhaseBegan)
         return false;
     if (!wheelEvent.deltaX())
         return false;
 
     MutexLocker lock(m_swipeStateMutex);
 
     if (wheelEvent.deltaX() > 0 && m_mainFramePinnedToTheLeft && m_canGoBack)
@@ skipping 10 matching lines @@
 }
 
 bool ScrollingTree::scrollingPerformanceLoggingEnabled()
 {
     return m_scrollingPerformanceLoggingEnabled;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(THREADED_SCROLLING)