Extract a DOMWindow interface from LocalDOMWindow and use it in the idl.

Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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 551 matching lines @@
     WillBeHeapVector<RefPtrWillBeMember<LocalFrame>> frames;
 
     // Even though we don't fire an event from here, the LocalDOMWindow's will fire
     // an event so we keep the frames alive until we are done.
     for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame())
             frames.append(toLocalFrame(frame));
     }
 
     for (unsigned i = 0; i < frames.size(); ++i)
-        frames[i]->domWindow()->acceptLanguagesChanged();
+        frames[i]->localDOMWindow()->acceptLanguagesChanged();
 }
 
 PageLifecycleNotifier& Page::lifecycleNotifier()
 {
     return static_cast<PageLifecycleNotifier&>(LifecycleContext<Page>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<Page>> Page::createLifecycleNotifier()
 {
     return PageLifecycleNotifier::create(this);
@@ skipping 61 matching lines @@
     , spellCheckerClient(nullptr)
     , storageClient(nullptr)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace blink