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

chrome/browser/ui/gtk/back_forward_button_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_BACK_FORWARD_BUTTON_GTK_H_
 #define CHROME_BROWSER_UI_GTK_BACK_FORWARD_BUTTON_GTK_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task.h"
 #include "chrome/browser/ui/gtk/custom_button.h"
 #include "chrome/browser/ui/gtk/menu_gtk.h"
 #include "ui/base/gtk/gtk_signal.h"
 
 class BackForwardMenuModel;
 class Browser;
 
 typedef struct _GtkWidget GtkWidget;
 
 // When clicked, these buttons will navigate forward or backward. When
 // pressed and held, they show a dropdown menu of recent web sites.
 class BackForwardButtonGtk : MenuGtk::Delegate {
  public:
   BackForwardButtonGtk(Browser* browser, bool is_forward);
   virtual ~BackForwardButtonGtk();
 
   // MenuGtk::Delegate implementation.
-  virtual void StoppedShowing();
-  virtual bool AlwaysShowIconForCmd(int command_id) const;
+  virtual void StoppedShowing() OVERRIDE;
+  virtual bool AlwaysShowIconForCmd(int command_id) const OVERRIDE;
 
   GtkWidget* widget() { return button_->widget(); }
 
  private:
   // Executes the browser command.
   CHROMEGTK_CALLBACK_0(BackForwardButtonGtk, void, OnClick);
 
   // Starts a timer to show the dropdown menu.
   CHROMEGTK_CALLBACK_1(BackForwardButtonGtk, gboolean, OnButtonPress,
                        GdkEventButton*);
@@ skipping 23 matching lines @@
 
   // The y position of the last mouse down event.
   int y_position_of_last_press_;
 
   base::WeakPtrFactory<BackForwardButtonGtk> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackForwardButtonGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_BACK_FORWARD_BUTTON_GTK_H_