replace newly added OVERRIDEs with override in chrome/browser/history/

chrome/browser/history/in_memory_url_index.h

 // Copyright (c) 2012 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_IN_MEMORY_URL_INDEX_H_
 #define CHROME_BROWSER_HISTORY_IN_MEMORY_URL_INDEX_H_
 
 #include <functional>
 #include <map>
 #include <set>
@@ skipping 227 matching lines @@
   // Handles notifications of history changes.
   virtual void Observe(int notification_type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) override;
 
   // HistoryServiceObserver:
   virtual void OnURLVisited(HistoryService* history_service,
                             ui::PageTransition transition,
                             const URLRow& row,
                             const RedirectList& redirects,
-                            base::Time visit_time) OVERRIDE;
+                            base::Time visit_time) override;
 
   // Notification handlers.
   void OnURLsModified(const URLsModifiedDetails* details);
   void OnURLsDeleted(const URLsDeletedDetails* details);
 
   // Sets the directory wherein the cache file will be maintained.
   // For unit test usage only.
   void set_history_dir(const base::FilePath& dir_path) {
     history_dir_ = dir_path;
   }
@@ skipping 50 matching lines @@
   // temporary safety check to insure that the cache is saved before the
   // index has been destructed.
   bool needs_to_be_cached_;
 
   DISALLOW_COPY_AND_ASSIGN(InMemoryURLIndex);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_IN_MEMORY_URL_INDEX_H_