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

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 42 matching lines @@
 
 namespace blink {
 
 using namespace HTMLNames;
 
 DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, frameCounter, ("Frame"));
 
 Frame::~Frame()
 {
     ASSERT(!m_owner);
-#if !ENABLE(OILPAN)
-    // FIXME: We should not be doing all this work inside the destructor
-    setDOMWindow(nullptr);
-#endif
-
 #ifndef NDEBUG
     frameCounter.decrement();
 #endif
 }
 
 void Frame::trace(Visitor* visitor)
 {
     visitor->trace(m_treeNode);
     visitor->trace(m_host);
     visitor->trace(m_owner);
-    visitor->trace(m_domWindow);
 }
 
 void Frame::detach()
 {
     ASSERT(m_client);
     disconnectOwnerElement();
     // After this, we must no longer talk to the client since this clears
     // its owning reference back to our owning LocalFrame.
     m_client->detached();
     m_client = nullptr;
@@ skipping 47 matching lines @@
         return true;
 
     return tree().parent()->isRemoteFrame();
 }
 
 HTMLFrameOwnerElement* Frame::deprecatedLocalOwner() const
 {
     return m_owner && m_owner->isLocal() ? toHTMLFrameOwnerElement(m_owner) : 0;
 }
 
-void Frame::setDOMWindow(PassRefPtrWillBeRawPtr<LocalDOMWindow> domWindow)
-{
-    if (m_domWindow)
-        m_domWindow->reset();
-
-    m_domWindow = domWindow;
-}
-
 static ChromeClient& emptyChromeClient()
 {
     DEFINE_STATIC_LOCAL(EmptyChromeClient, client, ());
     return client;
 }
 
 ChromeClient& Frame::chromeClient() const
 {
     if (Page* page = this->page())
         return page->chrome().client();
@@ skipping 52 matching lines @@
 
     if (m_owner) {
         if (m_owner->isLocal())
             toHTMLFrameOwnerElement(m_owner)->setContentFrame(*this);
     } else {
         page()->setMainFrame(this);
     }
 }
 
 } // namespace blink