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

Source/core/page/CreateWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 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 131 matching lines @@
     bool created;
     LocalFrame* newFrame = createWindow(*activeFrame, openerFrame, frameRequest, windowFeatures, NavigationPolicyIgnore, MaybeSendReferrer, created);
     if (!newFrame)
         return nullptr;
 
     if (newFrame != &openerFrame && newFrame != openerFrame.tree().top())
         newFrame->loader().forceSandboxFlags(openerFrame.document()->sandboxFlags());
 
     newFrame->loader().setOpener(&openerFrame);
 
-    if (newFrame->domWindow()->isInsecureScriptAccess(callingWindow, completedURL))
+    if (newFrame->localDOMWindow()->isInsecureScriptAccess(callingWindow, completedURL))
         return newFrame;
 
     if (function)
-        function(newFrame->domWindow(), functionContext);
+        function(newFrame->localDOMWindow(), functionContext);
 
     if (created)
         newFrame->loader().load(FrameLoadRequest(callingWindow.document(), completedURL));
     else if (!urlString.isEmpty())
         newFrame->navigationScheduler().scheduleLocationChange(callingWindow.document(), completedURL.string(), false);
     return newFrame;
 }
 
 void createWindowForRequest(const FrameLoadRequest& request, LocalFrame& openerFrame, NavigationPolicy policy, ShouldSendReferrer shouldSendReferrer)
 {
@@ skipping 17 matching lines @@
     if (shouldSendReferrer == MaybeSendReferrer) {
         newFrame->loader().setOpener(&openerFrame);
         newFrame->document()->setReferrerPolicy(openerFrame.document()->referrerPolicy());
     }
     FrameLoadRequest newRequest(0, request.resourceRequest());
     newRequest.setFormState(request.formState());
     newFrame->loader().load(newRequest);
 }
 
 } // namespace blink