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

chrome/browser/ui/gtk/content_setting_bubble_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_CONTENT_SETTING_BUBBLE_GTK_H_
 #define CHROME_BROWSER_UI_GTK_CONTENT_SETTING_BUBBLE_GTK_H_
 #pragma once
 
 #include <map>
 
@@ skipping 28 matching lines @@
 
  private:
   typedef std::map<GtkWidget*, int> PopupMap;
 
   // BubbleDelegateGtk:
   virtual void BubbleClosing(BubbleGtk* bubble, bool closed_by_escape) OVERRIDE;
 
   // content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
   // Builds the bubble and all the widgets that it displays.
   void BuildBubble();
 
   // Widget callback methods.
   CHROMEGTK_CALLBACK_1(ContentSettingBubbleGtk, void, OnPopupIconButtonPress,
                        GdkEventButton*);
   CHROMEGTK_CALLBACK_0(ContentSettingBubbleGtk, void, OnPopupLinkClicked);
   CHROMEGTK_CALLBACK_0(ContentSettingBubbleGtk, void, OnRadioToggled);
   CHROMEGTK_CALLBACK_0(ContentSettingBubbleGtk, void, OnCustomLinkClicked);
@@ skipping 23 matching lines @@
 
   // Stored controls so we can figure out what was clicked.
   PopupMap popup_links_;
   PopupMap popup_icons_;
 
   typedef std::vector<GtkWidget*> RadioGroupGtk;
   RadioGroupGtk radio_group_gtk_;
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_CONTENT_SETTING_BUBBLE_GTK_H_