Change FrameTree to return Frames instead of LocalFrames.

Source/core/dom/DocumentInit.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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
@@ skipping 36 matching lines @@
         return 0;
     return &ownerElement->document();
 }
 
 
 static Document* ownerDocument(LocalFrame* frame)
 {
     if (!frame)
         return 0;
 
-    LocalFrame* ownerFrame = frame->tree().parent();
+    Frame* ownerFrame = frame->tree().parent();
     if (!ownerFrame)
         ownerFrame = frame->loader().opener();
-    if (!ownerFrame)
+    if (!ownerFrame || !ownerFrame->isLocalFrame())
         return 0;
-    return ownerFrame->document();
+    return toLocalFrame(ownerFrame)->document();
 }
 
 DocumentInit::DocumentInit(const KURL& url, LocalFrame* frame, WeakPtrWillBeRawPtr<Document> contextDocument, HTMLImportsController* importsController)
     : m_url(url)
     , m_frame(frame)
     , m_parent(parentDocument(frame))
     , m_owner(ownerDocument(frame))
     , m_contextDocument(contextDocument)
     , m_importsController(importsController)
     , m_createNewRegistrationContext(false)
@@ skipping 83 matching lines @@
     return m_contextDocument;
 }
 
 DocumentInit DocumentInit::fromContext(WeakPtrWillBeRawPtr<Document> contextDocument, const KURL& url)
 {
     return DocumentInit(url, 0, contextDocument, 0);
 }
 
 } // namespace WebCore