Remove TabContents from TabStripModelObserver::ActiveTabChanged.

chrome/browser/ui/tabs/tab_strip_model_order_controller.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_ORDER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_ORDER_CONTROLLER_H_
 
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "content/public/common/page_transition_types.h"
 
@@ skipping 24 matching lines @@
                               content::PageTransition transition,
                               bool foreground);
 
   // Returns the index to append tabs at.
   int DetermineInsertionIndexForAppending();
 
   // Determine where to shift selection after a tab is closed.
   int DetermineNewSelectedIndex(int removed_index) const;
 
   // Overridden from TabStripModelObserver:
-  virtual void ActiveTabChanged(TabContents* old_contents,
-                                TabContents* new_contents,
+  virtual void ActiveTabChanged(content::WebContents* old_contents,
+                                content::WebContents* new_contents,
                                 int index,
                                 bool user_gesture) OVERRIDE;
 
  private:
   // Returns a valid index to be selected after the tab at |removing_index| is
   // closed. If |index| is after |removing_index|, |index| is adjusted to
   // reflect the fact that |removing_index| is going away.
   int GetValidIndex(int index, int removing_index) const;
 
   TabStripModel* tabstrip_;
 
   TabStripModel::InsertionPolicy insertion_policy_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStripModelOrderController);
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_ORDER_CONTROLLER_H_