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

chrome/browser/supervised_user/legacy/supervised_user_registration_utility_stub.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/supervised_user/legacy/supervised_user_registration_utility_stub.h"
 
+#include <memory>
+
 #include "base/bind.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 SupervisedUserRegistrationUtilityStub::SupervisedUserRegistrationUtilityStub()
     : register_was_called_(false) {
 }
 
 SupervisedUserRegistrationUtilityStub::
 ~SupervisedUserRegistrationUtilityStub() {
@@ skipping 20 matching lines @@
 }
 
 void SupervisedUserRegistrationUtilityStub::RunFailureCallback(
     const GoogleServiceAuthError::State state) {
   if (callback_.is_null())
     return;
   GoogleServiceAuthError error(state);
   callback_.Run(error, std::string());
   callback_.Reset();
 }