Add OVERRIDE to chrome/browser/ui/gtk/.

chrome/browser/ui/gtk/tabs/dragged_tab_controller_gtk.h

 // Copyright (c) 2011 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_DRAGGED_TAB_CONTROLLER_GTK_H_
 #define CHROME_BROWSER_UI_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 91 matching lines @@
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture) OVERRIDE;
   virtual void LoadingStateChanged(TabContents* source) OVERRIDE;
   virtual content::JavaScriptDialogCreator*
       GetJavaScriptDialogCreator() OVERRIDE;
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
   // Returns the point where a detached window should be created given the
   // current mouse position.
   gfx::Point GetWindowCreatePoint() const;
 
   // Move the DraggedTabView according to the current mouse screen position,
   // potentially updating the source and other TabStrips.
   void ContinueDragging();
 
   // Handles dragging tabs while the tabs are attached.
@@ skipping 144 matching lines @@
 
   // Timer used to bring the window under the cursor to front. If the user
   // stops moving the mouse for a brief time over a browser window, it is
   // brought to front.
   base::OneShotTimer<DraggedTabControllerGtk> bring_to_front_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DraggedTabControllerGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_