Add abstractions that let embedders drive tests of WebContents.

chrome/browser/external_tab_container_win.h

 // Copyright (c) 2012 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_EXTERNAL_TAB_CONTAINER_WIN_H_
 #define CHROME_BROWSER_EXTERNAL_TAB_CONTAINER_WIN_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 373 matching lines @@
 
   virtual content::WebContents* OpenURLFromTab(
     content::WebContents* source,
     const content::OpenURLParams& params) OVERRIDE;
 
   virtual void NavigationStateChanged(const content::WebContents* source,
                                       unsigned changed_flags) {
     NOTREACHED();
   }
 
-  virtual void CloseContents(TabContents* source) {
+  virtual void CloseContents(content::WebContents* source) {
     NOTREACHED();
   }
 
   virtual void UpdateTargetURL(content::WebContents* source, int32 page_id,
                                const GURL& url) {
     NOTREACHED();
   }
 
   void ForwardMessageToExternalHost(const std::string& message,
                                     const std::string& origin,
@@ skipping 11 matching lines @@
     return false;
   }
 
   virtual void BeforeUnloadFired(content::WebContents* tab, bool proceed,
                                  bool* proceed_to_fire_unload) {
     NOTREACHED();
   }
 };
 
 #endif  // CHROME_BROWSER_EXTERNAL_TAB_CONTAINER_WIN_H_