Add OVERRIDE to chrome/browser/.

chrome/browser/history/history_tab_helper.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_HISTORY_HISTORY_TAB_HELPER_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_
 #pragma once
 
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 24 matching lines @@
 
   // Returns the history::HistoryAddPageArgs to use for adding a page to
   // history.
   scoped_refptr<history::HistoryAddPageArgs> CreateHistoryAddPageArgs(
       const GURL& virtual_url,
       const content::LoadCommittedDetails& details,
       const ViewHostMsg_FrameNavigate_Params& params);
 
  private:
   // TabContentsObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message);
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
-      const ViewHostMsg_FrameNavigate_Params& params);
+      const ViewHostMsg_FrameNavigate_Params& params) OVERRIDE;
   virtual void DidNavigateAnyFrame(
       const content::LoadCommittedDetails& details,
-      const ViewHostMsg_FrameNavigate_Params& params);
+      const ViewHostMsg_FrameNavigate_Params& params) OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
   void OnPageContents(const GURL& url,
                       int32 page_id,
                       const string16& contents);
   void OnThumbnail(const GURL& url,
                    const ThumbnailScore& score,
                    const SkBitmap& bitmap);
 
   // Helper function to return the history service.  May return NULL.
   HistoryService* GetHistoryService();
 
   // Whether we have a (non-empty) title for the current page.
   // Used to prevent subsequent title updates from affecting history. This
   // prevents some weirdness because some AJAXy apps use titles for status
   // messages.
   bool received_page_title_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryTabHelper);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_