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

Source/bindings/core/v8/custom/V8InjectedScriptManager.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 100 matching lines @@
 
 bool InjectedScriptManager::canAccessInspectedWindow(ScriptState* scriptState)
 {
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Object> global = scriptState->context()->Global();
     if (global.IsEmpty())
         return false;
     v8::Handle<v8::Object> holder = V8Window::findInstanceInPrototypeChain(global, scriptState->isolate());
     if (holder.IsEmpty())
         return false;
-    LocalFrame* frame = V8Window::toImpl(holder)->frame();
+    LocalFrame* frame = toLocalDOMWindow(V8Window::toImpl(holder))->frame();
 
     return BindingSecurity::shouldAllowAccessToFrame(scriptState->isolate(), frame, DoNotReportSecurityError);
 }
 
 void InjectedScriptManager::setWeakCallback(const v8::WeakCallbackData<v8::Object, InjectedScriptManager::CallbackData>& data)
 {
     InjectedScriptManager::CallbackData* callbackData = data.GetParameter();
     callbackData->injectedScriptManager->removeCallbackData(callbackData);
 }
 
 } // namespace blink