Change more base::ListValue methods to use std::unique_ptr.

chrome/browser/chromeos/policy/affiliation_test_helper.cc

 // Copyright 2015 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/chromeos/policy/affiliation_test_helper.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
+#include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager_test_api.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_policy_builder.h"
 #include "chrome/browser/chromeos/policy/device_policy_cros_browser_test.h"
 #include "chromeos/chromeos_paths.h"
@@ skipping 69 matching lines @@
   for (const auto& user_affiliation_id : user_affiliation_ids) {
     user_policy->policy_data().add_user_affiliation_ids(user_affiliation_id);
   }
   user_policy->Build();
   fake_session_manager_client->set_user_policy(
       cryptohome::Identification(account_id), user_policy->GetBlob());
 }
 
 void PreLoginUser(const std::string& user_id) {
   ListPrefUpdate users_pref(g_browser_process->local_state(), "LoggedInUsers");
-  users_pref->AppendIfNotPresent(new base::StringValue(user_id));
+  users_pref->AppendIfNotPresent(base::MakeUnique<base::StringValue>(user_id));
   chromeos::StartupUtils::MarkOobeCompleted();
 }
 
 void LoginUser(const std::string& user_id) {
   chromeos::test::UserSessionManagerTestApi session_manager_test_api(
       chromeos::UserSessionManager::GetInstance());
   session_manager_test_api.SetShouldObtainTokenHandleInTests(false);
 
   chromeos::UserContext user_context(
       AccountId::FromUserEmailGaiaId(user_id, "gaia-id-" + user_id));
@@ skipping 26 matching lines @@
   // LoginManager tests typically don't stand up a policy test server but
   // instead inject policies directly through a SessionManagerClient. So allow
   // policy fetches to fail - this is expected.
   command_line->AppendSwitch(
       chromeos::switches::kAllowFailedPolicyFetchForTest);
 }
 
 }  // namespace affiliation_test_helper
 
 }  // namespace policy