Add a basic DOMWindow base class and use it in WindowProxy.

Source/core/frame/LocalFrame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 61 matching lines @@
         void init();
         void setView(PassRefPtrWillBeRawPtr<FrameView>);
         void createView(const IntSize&, const Color&, bool,
             ScrollbarMode = ScrollbarAuto, bool horizontalLock = false,
             ScrollbarMode = ScrollbarAuto, bool verticalLock = false);
 
         // Frame overrides:
         virtual ~LocalFrame();
         virtual void trace(Visitor*) override;
         virtual bool isLocalFrame() const override { return true; }
+        virtual LocalDOMWindow* domWindow() const override;
         virtual void navigate(Document& originDocument, const KURL&, bool lockBackForwardList) override;
         virtual void detach() override;
         virtual void disconnectOwnerElement() override;
 
         void addDestructionObserver(FrameDestructionObserver*);
         void removeDestructionObserver(FrameDestructionObserver*);
 
         void willDetachFrameHost();
 
-        virtual void setDOMWindow(PassRefPtrWillBeRawPtr<LocalDOMWindow>) override;
+        void setDOMWindow(PassRefPtrWillBeRawPtr<LocalDOMWindow>);
         FrameView* view() const;
         Document* document() const;
         void setPagePopupOwner(Element&);
         Element* pagePopupOwner() const { return m_pagePopupOwner.get(); }
 
         RenderView* contentRenderer() const; // Root of the render tree for the document contained in this frame.
 
         Editor& editor() const;
         EventHandler& eventHandler() const;
         FrameLoader& loader() const;
@@ skipping 67 matching lines @@
 
         String localLayerTreeAsText(unsigned flags) const;
 
         void detachView();
 
         WillBeHeapHashSet<RawPtrWillBeWeakMember<FrameDestructionObserver> > m_destructionObservers;
         mutable FrameLoader m_loader;
         mutable NavigationScheduler m_navigationScheduler;
 
         RefPtrWillBeMember<FrameView> m_view;
+        RefPtrWillBeMember<LocalDOMWindow> m_domWindow;
         // Usually 0. Non-null if this is the top frame of PagePopup.
         RefPtrWillBeMember<Element> m_pagePopupOwner;
 
         const OwnPtrWillBeMember<ScriptController> m_script;
         const OwnPtrWillBeMember<Editor> m_editor;
         const OwnPtrWillBeMember<SpellChecker> m_spellChecker;
         const OwnPtrWillBeMember<FrameSelection> m_selection;
         const OwnPtrWillBeMember<EventHandler> m_eventHandler;
         const OwnPtrWillBeMember<FrameConsole> m_console;
         const OwnPtrWillBeMember<InputMethodController> m_inputMethodController;
@@ skipping 90 matching lines @@
     DEFINE_TYPE_CASTS(LocalFrame, Frame, localFrame, localFrame->isLocalFrame(), localFrame.isLocalFrame());
 
 } // namespace blink
 
 // During refactoring, there are some places where we need to do type conversions that
 // will not be needed once all instances of LocalFrame and RemoteFrame are sorted out.
 // At that time this #define will be removed and all the uses of it will need to be corrected.
 #define toLocalFrameTemporary toLocalFrame
 
 #endif // LocalFrame_h