Move the frame tree into the embedder.

Source/core/frame/Frame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 60 matching lines @@
 #include "wtf/StdLibExtras.h"
 
 using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, frameCounter, ("Frame"));
 
-static inline Frame* parentFromOwnerElement(HTMLFrameOwnerElement* ownerElement)
-{
-    if (!ownerElement)
-        return 0;
-    return ownerElement->document().frame();
-}
-
 static inline float parentPageZoomFactor(Frame* frame)
 {
     Frame* parent = frame->tree().parent();
     if (!parent)
         return 1;
     return parent->pageZoomFactor();
 }
 
 static inline float parentTextZoomFactor(Frame* frame)
 {
     Frame* parent = frame->tree().parent();
     if (!parent)
         return 1;
     return parent->textZoomFactor();
 }
 
 inline Frame::Frame(PassRefPtr<FrameInit> frameInit)
     : m_host(frameInit->frameHost())
-    , m_treeNode(this, parentFromOwnerElement(frameInit->ownerElement()))
+    , m_treeNode(this)
     , m_loader(this, frameInit->frameLoaderClient())
     , m_navigationScheduler(this)
     , m_script(adoptPtr(new ScriptController(this)))
     , m_editor(Editor::create(*this))
     , m_spellChecker(SpellChecker::create(*this))
     , m_selection(adoptPtr(new FrameSelection(this)))
     , m_eventHandler(adoptPtr(new EventHandler(this)))
     , m_inputMethodController(InputMethodController::create(*this))
     , m_frameInit(frameInit)
     , m_pageZoomFactor(parentPageZoomFactor(this))
@@ skipping 616 matching lines @@
 {
     if (!m_host)
         return 0;
 
     double ratio = m_host->deviceScaleFactor();
     ratio *= pageZoomFactor();
     return ratio;
 }
 
 } // namespace WebCore