Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/image_writer_private/write_from_url_operation.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_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_
 
 #include <stdint.h>
 
 #include "chrome/browser/extensions/api/image_writer_private/operation.h"
@@ skipping 53 matching lines @@
   void VerifyDownloadCompare(const base::Closure& continuation,
                              const std::string& download_hash);
   void VerifyDownloadComplete(const base::Closure& continuation);
 
   // Arguments
   net::URLRequestContextGetter* request_context_;
   GURL url_;
   const std::string hash_;
 
   // Local state
-  scoped_ptr<net::URLFetcher> url_fetcher_;
+  std::unique_ptr<net::URLFetcher> url_fetcher_;
   base::Closure download_continuation_;
 };
 
 } // namespace image_writer
 } // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_