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

Source/core/frame/DOMWindowProperty.cpp

 /*
  * Copyright (C) 2011 Google, Inc. All Rights Reserved.
  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 24 matching lines @@
 DOMWindowProperty::DOMWindowProperty(LocalFrame* frame)
     : m_frame(frame)
 #if !ENABLE(OILPAN)
     , m_associatedDOMWindow(nullptr)
 #endif
 {
     // FIXME: For now it *is* acceptable for a DOMWindowProperty to be created with a null frame.
     // See fast/dom/navigator-detached-no-crash.html for the recipe.
     // We should fix that.  <rdar://problem/11567132>
     if (m_frame) {
+        // FIXME: Need to figure out what to do with DOMWindowProperties on
+        // remote DOM windows.
 #if ENABLE(OILPAN)
-        m_frame->domWindow()->registerProperty(this);
+        m_frame->localDOMWindow()->registerProperty(this);
 #else
-        m_associatedDOMWindow = m_frame->domWindow();
+        m_associatedDOMWindow = m_frame->localDOMWindow();
         m_associatedDOMWindow->registerProperty(this);
 #endif
     }
 }
 
 #if !ENABLE(OILPAN)
 DOMWindowProperty::~DOMWindowProperty()
 {
     if (m_associatedDOMWindow)
         m_associatedDOMWindow->unregisterProperty(this);
@@ skipping 27 matching lines @@
     ASSERT(m_associatedDOMWindow);
 #endif
 }
 
 void DOMWindowProperty::trace(Visitor* visitor)
 {
     visitor->trace(m_frame);
 }
 
 } // namespace blink