Make RootScroller set the outer viewport scroll layer in the compositor

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 583 matching lines @@
 void Document::initializeRootScroller(ViewportScrollCallback* callback)
 {
     m_rootScrollerController->setViewportScrollCallback(callback);
 }
 
 Element* Document::rootScroller() const
 {
     return m_rootScrollerController->get();
 }
 
-const Element* Document::effectiveRootScroller() const
-{
-    return m_rootScrollerController->effectiveRootScroller();
-}
-
 bool Document::isViewportScrollCallback(const ScrollStateCallback* callback)
 {
     if (!callback)
         return false;
 
     return callback == m_rootScrollerController->viewportScrollCallback();
 }
 
 bool Document::isInMainFrame() const
 {
@@ skipping 5411 matching lines @@
 }
 
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif