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

chrome/browser/supervised_user/legacy/custodian_profile_downloader_service.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_SUPERVISED_USER_LEGACY_CUSTODIAN_PROFILE_DOWNLOADER_SERVICE_H_
 #define CHROME_BROWSER_SUPERVISED_USER_LEGACY_CUSTODIAN_PROFILE_DOWNLOADER_SERVICE_H_
 
 #include "base/callback.h"
 #include "chrome/browser/profiles/profile_downloader.h"
 #include "chrome/browser/profiles/profile_downloader_delegate.h"
@@ skipping 29 matching lines @@
   void OnProfileDownloadFailure(
       ProfileDownloader* downloader,
       ProfileDownloaderDelegate::FailureReason reason) override;
 
  private:
   friend class CustodianProfileDownloaderServiceFactory;
   // Use |CustodianProfileDownloaderServiceFactory::GetForProfile(...)| to
   // get instances of this service.
   explicit CustodianProfileDownloaderService(Profile* custodian_profile);
 
-  scoped_ptr<ProfileDownloader> profile_downloader_;
+  std::unique_ptr<ProfileDownloader> profile_downloader_;
   DownloadProfileCallback download_callback_;
 
   // Owns us via the KeyedService mechanism.
   Profile* custodian_profile_;
 
   std::string last_downloaded_profile_email_;
   std::string in_progress_profile_email_;
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_LEGACY_CUSTODIAN_PROFILE_DOWNLOADER_SERVICE_H_