Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

components/user_manager/user_manager_base.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 "components/user_manager/user_manager_base.h"
 
 #include <stddef.h>
 #include <set>
 #include <utility>
 
@@ skipping 948 matching lines @@
   ListPrefUpdate prefs_users_update(GetLocalState(), kRegularUsers);
   prefs_users_update->Clear();
   User* user = nullptr;
   for (UserList::iterator it = users_.begin(); it != users_.end();) {
     if ((*it)->GetAccountId() == account_id) {
       user = *it;
       it = users_.erase(it);
     } else {
       if ((*it)->HasGaiaAccount() || (*it)->IsSupervised()) {
         const std::string user_email = (*it)->email();
-        prefs_users_update->Append(new base::StringValue(user_email));
+        prefs_users_update->AppendString(user_email);
       }
       ++it;
     }
   }
   OnUserRemoved(account_id);
   return user;
 }
 
 void UserManagerBase::NotifyActiveUserChanged(const User* active_user) {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
@@ skipping 96 matching lines @@
 }
 
 void UserManagerBase::DeleteUser(User* user) {
   const bool is_active_user = (user == active_user_);
   delete user;
   if (is_active_user)
     active_user_ = nullptr;
 }
 
 }  // namespace user_manager