Don't use GetAsTabContents. Send notifications from TabContentsView instead.

chrome/browser/extensions/extension_host.h

 // Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 121 matching lines @@
                                     const GURL& frame_url,
                                     const int flags,
                                     IPC::Message* reply_msg,
                                     bool* did_suppress_message);
   virtual void Close(RenderViewHost* render_view_host);
   virtual RendererPreferences GetRendererPrefs(Profile* profile) const;
 
   // RenderViewHostDelegate::View
   virtual void CreateNewWindow(
       int route_id,
-      WindowContainerType window_container_type,
-      const string16& frame_name);
+      const ViewHostMsg_CreateWindow_Params& params);
   virtual void CreateNewWidget(int route_id, WebKit::WebPopupType popup_type);
   virtual void CreateNewFullscreenWidget(int route_id,
                                          WebKit::WebPopupType popup_type);
   virtual void ShowCreatedWindow(int route_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture);
   virtual void ShowCreatedWidget(int route_id,
                                  const gfx::Rect& initial_pos);
   virtual void ShowCreatedFullscreenWidget(int route_id);
@@ skipping 126 matching lines @@
   // Used to measure how long it's been since the host was created.
   PerfTimer since_created_;
 
   // FileSelectHelper, lazily created.
   scoped_ptr<FileSelectHelper> file_select_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_