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

chrome/browser/chromeos/file_system_provider/fileapi/buffering_file_stream_reader.cc

 // 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.
 
 #include "chrome/browser/chromeos/file_system_provider/fileapi/buffering_file_stream_reader.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "storage/browser/fileapi/file_system_backend.h"
 
 namespace chromeos {
 namespace file_system_provider {
 
 BufferingFileStreamReader::BufferingFileStreamReader(
-    scoped_ptr<storage::FileStreamReader> file_stream_reader,
+    std::unique_ptr<storage::FileStreamReader> file_stream_reader,
     int preloading_buffer_length,
     int64_t max_bytes_to_read)
     : file_stream_reader_(std::move(file_stream_reader)),
       preloading_buffer_length_(preloading_buffer_length),
       max_bytes_to_read_(max_bytes_to_read),
       bytes_read_(0),
       preloading_buffer_(new net::IOBuffer(preloading_buffer_length)),
       preloading_buffer_offset_(0),
       preloaded_bytes_(0),
       weak_ptr_factory_(this) {}
@@ skipping 102 matching lines @@
   }
 
   bytes_read_ += result;
   DCHECK_LE(bytes_read_, max_bytes_to_read_);
 
   callback.Run(result);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos