Add OVERRIDE to chrome/browser/.

chrome/browser/autocomplete/search_provider.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.
 //
 // This file contains the Search autocomplete provider.  This provider is
 // responsible for all non-keyword autocomplete entries that start with
 // "Search <engine> for ...", including searching for the current input string,
 // search history, and search suggestions.  An instance of it gets created and
 // managed by the autocomplete controller.
 //
@@ skipping 53 matching lines @@
   // the instant result.
   void FinalizeInstantQuery(const string16& input_text,
                             const string16& suggest_text);
 
   // AutocompleteProvider
   virtual void Start(const AutocompleteInput& input,
                      bool minimal_changes) OVERRIDE;
   virtual void Stop() OVERRIDE;
 
   // content::URLFetcherDelegate
-  virtual void OnURLFetchComplete(const content::URLFetcher* source);
+  virtual void OnURLFetchComplete(const content::URLFetcher* source) OVERRIDE;
 
   // ID used in creating URLFetcher for default provider's suggest results.
   static const int kDefaultProviderURLFetcherID;
 
   // ID used in creating URLFetcher for keyword provider's suggest results.
   static const int kKeywordProviderURLFetcherID;
 
  private:
   virtual ~SearchProvider();
 
@@ skipping 241 matching lines @@
   // Has FinalizeInstantQuery been invoked since the last |Start|?
   bool instant_finalized_;
 
   // The |suggest_text| parameter passed to FinalizeInstantQuery.
   string16 default_provider_suggest_text_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_SEARCH_PROVIDER_H_