Add OVERRIDE to chrome/browser/.

chrome/browser/tab_contents/thumbnail_generator.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_TAB_CONTENTS_THUMBNAIL_GENERATOR_H_
 #define CHROME_BROWSER_TAB_CONTENTS_THUMBNAIL_GENERATOR_H_
 #pragma once
 
 #include <map>
 #include <utility>
@@ skipping 106 matching lines @@
 
   // Update the thumbnail of the given tab contents if necessary.
   void UpdateThumbnailIfNecessary(TabContents* tab_contents);
 
   // Returns true if we should update the thumbnail of the given URL.
   static bool ShouldUpdateThumbnail(Profile* profile,
                                     history::TopSites* top_sites,
                                     const GURL& url);
 
   // TabContentsObserver overrides.
-  virtual void DidStartLoading();
-  virtual void StopNavigation();
+  virtual void DidStartLoading() OVERRIDE;
+  virtual void StopNavigation() OVERRIDE;
 
  private:
   virtual void WidgetDidReceivePaintAtSizeAck(
       RenderWidgetHost* widget,
       int tag,
       const gfx::Size& size);
 
   // content::NotificationObserver interface.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
   // Indicates that the given widget has changed is visibility.
   void WidgetHidden(RenderWidgetHost* widget);
 
   // Called when the given tab contents are disconnected (either
   // through being closed, or because the renderer is no longer there).
   void TabContentsDisconnected(TabContents* contents);
 
   content::NotificationRegistrar registrar_;
 
   // Map of callback objects by sequence number.
   struct AsyncRequestInfo;
   typedef std::map<int,
                    linked_ptr<AsyncRequestInfo> > ThumbnailCallbackMap;
   ThumbnailCallbackMap callback_map_;
 
   bool load_interrupted_;
 
   DISALLOW_COPY_AND_ASSIGN(ThumbnailGenerator);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_THUMBNAIL_GENERATOR_H_