Add abstractions that let embedders drive tests of WebContents.

chrome/browser/tabs/tab_strip_model.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_TABS_TAB_STRIP_MODEL_H_
 #define CHROME_BROWSER_TABS_TAB_STRIP_MODEL_H_
 #pragma once
 
 #include <vector>
 
 #include "base/observer_list.h"
 #include "chrome/browser/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/tabs/tab_strip_selection_model.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/page_transition_types.h"
 
 class Profile;
-class TabContents;
 class TabContentsWrapper;
 class TabStripModelDelegate;
 class TabStripModelOrderController;
 
 namespace content {
 class NavigationController;
 class WebContents;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 638 matching lines @@
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
   TabStripSelectionModel selection_model_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TabStripModel);
 };
 
 #endif  // CHROME_BROWSER_TABS_TAB_STRIP_MODEL_H_