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

chrome/browser/chromeos/login/login_manager_test.cc

 // Copyright 2013 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/login/login_manager_test.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 137 matching lines @@
       UserSessionManager::GetInstance());
   session_manager_test_api.SetShouldLaunchBrowserInTests(
       should_launch_browser_);
   session_manager_test_api.SetShouldObtainTokenHandleInTests(false);
 
   MixinBasedBrowserTest::SetUpOnMainThread();
 }
 
 void LoginManagerTest::RegisterUser(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));
 }
 
 void LoginManagerTest::SetExpectedCredentials(const UserContext& user_context) {
   test::UserSessionManagerTestApi session_manager_test_api(
       UserSessionManager::GetInstance());
   session_manager_test_api.InjectStubUserContext(user_context);
 }
 
 bool LoginManagerTest::TryToLogin(const UserContext& user_context) {
   if (!AddUserToSession(user_context))
@@ skipping 53 matching lines @@
   EXPECT_TRUE(host != NULL);
 
   content::WebContents* web_contents =
       host->GetWebUILoginView()->GetWebContents();
   EXPECT_TRUE(web_contents != NULL);
   set_web_contents(web_contents);
   js_checker_.set_web_contents(web_contents);
 }
 
 }  // namespace chromeos