Add OVERRIDE to chrome/browser/.

chrome/browser/icon_manager.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.
 //
 // Class for finding and caching Windows explorer icons. The IconManager
 // lives on the UI thread but performs icon extraction work on the file thread
 // to avoid blocking the UI thread with potentially expensive COM and disk
 // operations.
 //
 // Terminology
@@ skipping 67 matching lines @@
   // thread. The return value is the 'request_id' that will be passed to the
   // client in the callback. Note: this does *not* check the cache.
   //
   // WATCH OUT: The returned bitmap pointer may be NULL if decoding failed.
   Handle LoadIcon(const FilePath& file_name,
                   IconLoader::IconSize size,
                   CancelableRequestConsumerBase* consumer,
                   const IconRequestCallback& callback);
 
   // IconLoader::Delegate interface.
-  virtual bool OnImageLoaded(IconLoader* source, gfx::Image* result);
+  virtual bool OnImageLoaded(IconLoader* source, gfx::Image* result) OVERRIDE;
 
   // Get the identifying string for the given file. The implementation
   // is in icon_manager_[platform].cc.
   static IconGroupID GetGroupIDFromFilepath(const FilePath& path);
 
  private:
   struct CacheKey {
     CacheKey(const IconGroupID& group, IconLoader::IconSize size);
 
     // Used as a key in the map below, so we need this comparator.
@@ skipping 10 matching lines @@
 
   // Asynchronous requests that have not yet been completed.
   struct ClientRequest;
   typedef std::map<IconLoader*, ClientRequest> ClientRequests;
   ClientRequests requests_;
 
   DISALLOW_COPY_AND_ASSIGN(IconManager);
 };
 
 #endif  // CHROME_BROWSER_ICON_MANAGER_H_