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

Source/core/testing/Internals.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 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.
@@ skipping 122 matching lines @@
 
     String visiblePlaceholder(Element*);
     void selectColorInColorChooser(Element*, const String& colorValue);
     void endColorChooser(Element*);
     bool hasAutofocusRequest(Document*);
     bool hasAutofocusRequest();
     Vector<String> formControlStateOfHistoryItem(ExceptionState&);
     void setFormControlStateOfHistoryItem(const Vector<String>&, ExceptionState&);
     void setEnableMockPagePopup(bool, ExceptionState&);
     PassRefPtrWillBeRawPtr<PagePopupController> pagePopupController();
-    LocalDOMWindow* pagePopupWindow() const;
+    DOMWindow* pagePopupWindow() const;
 
     PassRefPtrWillBeRawPtr<ClientRect> absoluteCaretBounds(ExceptionState&);
 
     PassRefPtrWillBeRawPtr<ClientRect> boundingBox(Element*);
 
     unsigned markerCountForNode(Node*, const String&, ExceptionState&);
     unsigned activeMarkerCountForNode(Node*);
     PassRefPtrWillBeRawPtr<Range> markerRangeForNode(Node*, const String& markerType, unsigned index, ExceptionState&);
     String markerDescriptionForNode(Node*, const String& markerType, unsigned index, ExceptionState&);
     void addTextMatchMarker(const Range*, bool isActive);
@@ skipping 186 matching lines @@
     PassRefPtrWillBeRawPtr<ClientRectList> annotatedRegions(Document*, bool draggable, ExceptionState&);
 
     DocumentMarker* markerAt(Node*, const String& markerType, unsigned index, ExceptionState&);
     Member<InternalRuntimeFlags> m_runtimeFlags;
     Member<InternalProfilers> m_profilers;
 };
 
 } // namespace blink
 
 #endif // Internals_h