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

chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.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/fileapi/mtp_file_system_backend_delegate.h"
 #include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
 #include "storage/browser/fileapi/file_stream_reader.h"
 #include "storage/browser/fileapi/file_stream_writer.h"
 #include "storage/browser/fileapi/file_system_url.h"
 
@@ skipping 11 matching lines @@
 MTPFileSystemBackendDelegate::~MTPFileSystemBackendDelegate() {
 }
 
 storage::AsyncFileUtil* MTPFileSystemBackendDelegate::GetAsyncFileUtil(
     storage::FileSystemType type) {
   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, type);
 
   return device_media_async_file_util_.get();
 }
 
-scoped_ptr<storage::FileStreamReader>
+std::unique_ptr<storage::FileStreamReader>
 MTPFileSystemBackendDelegate::CreateFileStreamReader(
     const storage::FileSystemURL& url,
     int64_t offset,
     int64_t max_bytes_to_read,
     const base::Time& expected_modification_time,
     storage::FileSystemContext* context) {
   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
 
   return device_media_async_file_util_->GetFileStreamReader(
       url, offset, expected_modification_time, context);
 }
 
-scoped_ptr<storage::FileStreamWriter>
+std::unique_ptr<storage::FileStreamWriter>
 MTPFileSystemBackendDelegate::CreateFileStreamWriter(
     const storage::FileSystemURL& url,
     int64_t offset,
     storage::FileSystemContext* context) {
   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
 
   // TODO(kinaba): support writing.
-  return scoped_ptr<storage::FileStreamWriter>();
+  return std::unique_ptr<storage::FileStreamWriter>();
 }
 
 storage::WatcherManager* MTPFileSystemBackendDelegate::GetWatcherManager(
     storage::FileSystemType type) {
   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, type);
   return mtp_watcher_manager_.get();
 }
 
 void MTPFileSystemBackendDelegate::GetRedirectURLForContents(
     const storage::FileSystemURL& url,
     const storage::URLCallback& callback) {
   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
 
   callback.Run(GURL());
 }
 
 }  // namespace chromeos