Creating supervised users restricted for regular users if they are supervised.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
index a371c90310074a0bd29f1e6f1a58bb87bf9087f1..e22220c27a8da613962626a1be8a2ba455139a31 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
@@ -230,6 +230,20 @@ user_manager::UserList ChromeUserManagerImpl::GetUsersAllowedForMultiProfile()
   return result;
 }
 
+user_manager::UserList
+ChromeUserManagerImpl::GetUsersAllowedForSupervisedUsersCreation() const {
+  CrosSettings* cros_settings = CrosSettings::Get();
+  bool allow_new_user = true;
+  cros_settings->GetBoolean(kAccountsPrefAllowNewUser, &allow_new_user);
+  bool supervised_users_allowed = AreSupervisedUsersAllowed();
+
+  // Restricted either by policy or by owner.
+  if (!allow_new_user || !supervised_users_allowed)
+    return user_manager::UserList();
+
+  return GetUsersAllowedAsSupervisedUserManagers(GetUsers());
+}
+
 user_manager::UserList ChromeUserManagerImpl::GetUnlockUsers() const {
   const user_manager::UserList& logged_in_users = GetLoggedInUsers();
   if (logged_in_users.empty())