replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/blob_reader.h

 // Copyright 2013 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_EXTENSIONS_BLOB_READER_H_
 #define CHROME_BROWSER_EXTENSIONS_BLOB_READER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 22 matching lines @@
              const std::string& blob_uuid,
              BlobReadCallback callback);
   virtual ~BlobReader();
 
   void SetByteRange(int64 offset, int64 length);
 
   void Start();
 
  private:
   // Overridden from net::URLFetcherDelegate.
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   BlobReadCallback callback_;
   scoped_ptr<net::URLFetcher> fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobReader);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_BLOB_READER_H_