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

chrome/browser/chromeos/file_system_provider/operations/add_watcher.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/operations/add_watcher.h"
 
 #include <string>
 
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
@@ skipping 27 matching lines @@
 
   return SendEvent(
       request_id,
       extensions::events::FILE_SYSTEM_PROVIDER_ON_ADD_WATCHER_REQUESTED,
       extensions::api::file_system_provider::OnAddWatcherRequested::kEventName,
       extensions::api::file_system_provider::OnAddWatcherRequested::Create(
           options));
 }
 
 void AddWatcher::OnSuccess(int /* request_id */,
-                           scoped_ptr<RequestValue> /* result */,
+                           std::unique_ptr<RequestValue> /* result */,
                            bool has_more) {
   callback_.Run(base::File::FILE_OK);
 }
 
 void AddWatcher::OnError(int /* request_id */,
-                         scoped_ptr<RequestValue> /* result */,
+                         std::unique_ptr<RequestValue> /* result */,
                          base::File::Error error) {
   callback_.Run(error);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos