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

chrome/browser/sync_file_system/drive_backend/sync_task.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/sync_file_system/drive_backend/sync_task.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_manager.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_token.h"
 #include "chrome/browser/sync_file_system/drive_backend/task_dependency_manager.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 namespace {
 
 void CallRunExclusive(const base::WeakPtr<ExclusiveTask>& task,
-                      scoped_ptr<SyncTaskToken> token) {
+                      std::unique_ptr<SyncTaskToken> token) {
   if (task)
     task->RunExclusive(SyncTaskToken::WrapToCallback(std::move(token)));
 }
 
 }  // namespace
 
 ExclusiveTask::ExclusiveTask() : weak_ptr_factory_(this) {}
 ExclusiveTask::~ExclusiveTask() {}
 
-void ExclusiveTask::RunPreflight(scoped_ptr<SyncTaskToken> token) {
-  scoped_ptr<TaskBlocker> task_blocker(new TaskBlocker);
+void ExclusiveTask::RunPreflight(std::unique_ptr<SyncTaskToken> token) {
+  std::unique_ptr<TaskBlocker> task_blocker(new TaskBlocker);
   task_blocker->exclusive = true;
 
   SyncTaskManager::UpdateTaskBlocker(
       std::move(token), std::move(task_blocker),
       base::Bind(&CallRunExclusive, weak_ptr_factory_.GetWeakPtr()));
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system