Move Document pointer from Frame to LocalFrame.

Source/core/html/HTMLFrameOwnerElement.cpp

 /*
  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 134 matching lines @@
 }
 
 HTMLFrameOwnerElement::~HTMLFrameOwnerElement()
 {
     if (m_contentFrame)
         m_contentFrame->disconnectOwnerElement();
 }
 
 Document* HTMLFrameOwnerElement::contentDocument() const
 {
-    return m_contentFrame ? m_contentFrame->document() : 0;
+    return (m_contentFrame && m_contentFrame->isLocalFrame()) ? toLocalFrame(m_contentFrame)->document() : 0;
 }
 
 DOMWindow* HTMLFrameOwnerElement::contentWindow() const
 {
     return m_contentFrame ? m_contentFrame->domWindow() : 0;
 }
 
 void HTMLFrameOwnerElement::setSandboxFlags(SandboxFlags flags)
 {
     m_sandboxFlags = flags;
@@ skipping 95 matching lines @@
     // FIXME: In this case the LocalFrame will have finished loading before
     // it's being added to the child list. It would be a good idea to
     // create the child first, then invoke the loader separately.
     if (childFrame->loader().state() == FrameStateComplete && !childFrame->loader().policyDocumentLoader())
         childFrame->loader().checkCompleted();
     return true;
 }
 
 
 } // namespace WebCore