Cleanup various WebView/WebFrame APIs to properly handle remote frames.

Source/core/frame/LocalFrame.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 88 matching lines @@
     , m_inputMethodController(InputMethodController::create(*this))
     , m_pageZoomFactor(parentPageZoomFactor(this))
     , m_textZoomFactor(parentTextZoomFactor(this))
     , m_inViewSourceMode(false)
 {
 }
 
 PassRefPtr<LocalFrame> LocalFrame::create(FrameLoaderClient* client, FrameHost* host, FrameOwner* owner)
 {
     RefPtr<LocalFrame> frame = adoptRef(new LocalFrame(client, host, owner));
-    // FIXME: Why is this here? RemoteFrames need this too.
-    if (!frame->owner())
-        frame->page()->setMainFrame(frame);
     InspectorInstrumentation::frameAttachedToParent(frame.get());
     return frame.release();
 }
 
 LocalFrame::~LocalFrame()
 {
     setView(nullptr);
     loader().clear();
     setDOMWindow(nullptr);
 }
@@ skipping 532 matching lines @@
 LocalFrame* LocalFrame::localFrameRoot()
 {
     LocalFrame* curFrame = this;
     while (curFrame && curFrame->tree().parent() && curFrame->tree().parent()->isLocalFrame())
         curFrame = toLocalFrame(curFrame->tree().parent());
 
     return curFrame;
 }
 
 } // namespace WebCore