Remove various TabContents use from TabStripModel.

chrome/browser/ui/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_UI_TABS_TAB_STRIP_MODEL_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 502 matching lines @@
 
   // Notifies the observers if the active tab has changed.
   void NotifyIfActiveTabChanged(content::WebContents* old_contents,
                                 NotifyTypes notify_types);
 
   // Notifies the observers if the active tab or the tab selection has changed.
   // |old_model| is a snapshot of |selection_model_| before the change.
   // Note: This function might end up sending 0 to 2 notifications in the
   // following order: ActiveTabChanged, TabSelectionChanged.
   void NotifyIfActiveOrSelectionChanged(
-      TabContents* old_contents,
+      content::WebContents* old_contents,
       NotifyTypes notify_types,
       const TabStripSelectionModel& old_model);
 
   // Sets the selection to |new_model| and notifies any observers.
   // Note: This function might end up sending 0 to 3 notifications in the
   // following order: TabDeactivated, ActiveTabChanged, TabSelectionChanged.
   void SetSelection(const TabStripSelectionModel& new_model,
                     NotifyTypes notify_types);
 
   // Selects either the next tab (|forward| is true), or the previous tab
@@ skipping 104 matching lines @@
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
   TabStripSelectionModel selection_model_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TabStripModel);
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_H_