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

chrome/browser/extensions/api/image_writer_private/destroy_partitions_operation.h

 // Copyright 2014 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_API_IMAGE_WRITER_PRIVATE_DESTROY_PARTITIONS_OPERATION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_DESTROY_PARTITIONS_OPERATION_H_
 
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/browser/extensions/api/image_writer_private/operation.h"
 
 namespace extensions {
 namespace image_writer {
 
 extern const int kPartitionTableSize;
 
 // Encapsulates an operation for destroying partitions.  This is achieved by
 // creating a dummy blank image which is then burned to the disk.
 class DestroyPartitionsOperation : public Operation {
  public:
   DestroyPartitionsOperation(base::WeakPtr<OperationManager> manager,
                              const ExtensionId& extension_id,
                              const std::string& storage_unit_id);
-  virtual void StartImpl() OVERRIDE;
+  virtual void StartImpl() override;
 
  private:
   virtual ~DestroyPartitionsOperation();
 };
 
 }  // namespace image_writer
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_DESTROY_PARTITIONS_OPERATION_H_