Remove TabContents from TabStripModelObserver::TabReplacedAt.

chrome/browser/ui/gtk/tabs/tab_strip_gtk.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_GTK_TABS_TAB_STRIP_GTK_H_
 #define CHROME_BROWSER_UI_GTK_TABS_TAB_STRIP_GTK_H_
 
 #include <gtk/gtk.h>
 #include <vector>
 
@@ skipping 110 matching lines @@
                                 content::WebContents* new_contents,
                                 int index,
                                 bool user_gesture) OVERRIDE;
   virtual void TabSelectionChanged(
       TabStripModel* tab_strip_model,
       const TabStripSelectionModel& old_model) OVERRIDE;
   virtual void TabChangedAt(content::WebContents* contents,
                             int index,
                             TabChangeType change_type) OVERRIDE;
   virtual void TabReplacedAt(TabStripModel* tab_strip_model,
-                             TabContents* old_contents,
-                             TabContents* new_contents,
+                             content::WebContents* old_contents,
+                             content::WebContents* new_contents,
                              int index) OVERRIDE;
   virtual void TabMiniStateChanged(content::WebContents* contents,
                                    int index) OVERRIDE;
   virtual void TabBlockedStateChanged(content::WebContents* contents,
                                       int index) OVERRIDE;
 
   // TabGtk::TabDelegate implementation:
   virtual bool IsTabActive(const TabGtk* tab) const OVERRIDE;
   virtual bool IsTabSelected(const TabGtk* tab) const OVERRIDE;
   virtual bool IsTabPinned(const TabGtk* tab) const OVERRIDE;
@@ skipping 352 matching lines @@
 
   // Helper for performing tab selection as a result of dragging over a tab.
   HoverTabSelector hover_tab_selector_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStripGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_TABS_TAB_STRIP_GTK_H_