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

chrome/browser/chromeos/drive/download_handler.h

 // Copyright (c) 2012 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_CHROMEOS_DRIVE_DOWNLOAD_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DOWNLOAD_HANDLER_H_
 
 #include <stdint.h>
 
 #include "base/callback_forward.h"
@@ skipping 106 matching lines @@
                         FileError error);
 
   // Gets a download manager, given a |manager_id| casted from the pointer to
   // the manager. This is used to validate the manager that may be deleted while
   // asynchronous task posting. Returns NULL if the manager is already gone.
   content::DownloadManager* GetDownloadManager(void* manager_id);
 
   FileSystemInterface* file_system_;  // Owned by DriveIntegrationService.
 
   // Observe the DownloadManager for new downloads.
-  scoped_ptr<AllDownloadItemNotifier> notifier_;
-  scoped_ptr<AllDownloadItemNotifier> notifier_incognito_;
+  std::unique_ptr<AllDownloadItemNotifier> notifier_;
+  std::unique_ptr<AllDownloadItemNotifier> notifier_incognito_;
 
   // Temporary download location directory.
   base::FilePath drive_tmp_download_path_;
 
   // True if there is pending FreeDiskSpaceIfNeeded call.
   bool has_pending_free_disk_space_;
 
   base::TimeDelta free_disk_space_delay_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DownloadHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadHandler);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DOWNLOAD_HANDLER_H_