Prevent the browser process from creating duplicate RenderViewHosts.

content/browser/frame_host/interstitial_page_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 101 matching lines @@
       const ViewHostMsg_FrameNavigate_Params& params) OVERRIDE;
   virtual void UpdateTitle(RenderViewHost* render_view_host,
                            int32 page_id,
                            const string16& title,
                            base::i18n::TextDirection title_direction) OVERRIDE;
   virtual RendererPreferences GetRendererPrefs(
       BrowserContext* browser_context) const OVERRIDE;
   virtual WebPreferences GetWebkitPrefs() OVERRIDE;
   virtual gfx::Rect GetRootWindowResizerRect() const OVERRIDE;
   virtual void CreateNewWindow(
+      int render_process_id,
       int route_id,
       int main_frame_route_id,
       const ViewHostMsg_CreateWindow_Params& params,
       SessionStorageNamespace* session_storage_namespace) OVERRIDE;
   virtual void CreateNewWidget(int route_id,
                                blink::WebPopupType popup_type) OVERRIDE;
   virtual void CreateNewFullscreenWidget(int route_id) OVERRIDE;
   virtual void ShowCreatedWindow(int route_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
@@ skipping 129 matching lines @@
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_