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

chrome/browser/sync_file_system/drive_backend/sync_task.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 class SyncTaskToken;
 
 class SyncTask {
  public:
   SyncTask() : used_network_(false) {}
   virtual ~SyncTask() {}
-  virtual void RunPreflight(scoped_ptr<SyncTaskToken> token) = 0;
+  virtual void RunPreflight(std::unique_ptr<SyncTaskToken> token) = 0;
 
   bool used_network() { return used_network_; }
 
  protected:
   void set_used_network(bool used_network) {
     used_network_ = used_network;
   }
 
  private:
   bool used_network_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncTask);
 };
 
 class ExclusiveTask : public SyncTask {
  public:
   ExclusiveTask();
   ~ExclusiveTask() override;
 
-  void RunPreflight(scoped_ptr<SyncTaskToken> token) final;
+  void RunPreflight(std::unique_ptr<SyncTaskToken> token) final;
   virtual void RunExclusive(const SyncStatusCallback& callback) = 0;
 
  private:
   base::WeakPtrFactory<ExclusiveTask> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExclusiveTask);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_H_