bindings: Window must be LocalDOMWindow by definition.

Source/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 106 matching lines @@
     double scrollX() const override;
     double scrollY() const override;
     bool closed() const override;
     unsigned length() const override;
     const AtomicString& name() const override;
     void setName(const AtomicString&) override;
     String status() const override;
     void setStatus(const String&) override;
     String defaultStatus() const override;
     void setDefaultStatus(const String&) override;
-    DOMWindow* self() const override;
-    DOMWindow* opener() const override;
-    DOMWindow* parent() const override;
-    DOMWindow* top() const override;
+    LocalDOMWindow* self() const override;
+    LocalDOMWindow* window() const { return self(); }
+    LocalDOMWindow* frames() const { return self(); }
+    LocalDOMWindow* opener() const override;
+    LocalDOMWindow* parent() const override;
+    LocalDOMWindow* top() const override;
     Document* document() const override;
     StyleMedia* styleMedia() const override;
     double devicePixelRatio() const override;
     Storage* sessionStorage(ExceptionState&) const override;
     Storage* localStorage(ExceptionState&) const override;
     ApplicationCache* applicationCache() const override;
     int orientation() const override;
     Console* console() const override;
     Performance* performance() const override;
     DOMWindowCSS* css() const override;
@@ skipping 245 matching lines @@
 }
 
 inline String LocalDOMWindow::defaultStatus() const
 {
     return m_defaultStatus;
 }
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h