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

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

Index: chrome/browser/chromeos/login/users/chrome_user_manager.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager.cc b/chrome/browser/chromeos/login/users/chrome_user_manager.cc
index 1800e302f24de26cf725dd50efe530e82a60564d..eccc602e211ddd36d2a8010f0f9971378cc4790c 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager.cc
@@ -22,4 +22,17 @@ ChromeUserManager* ChromeUserManager::Get() {
   return user_manager ? static_cast<ChromeUserManager*>(user_manager) : NULL;
 }
 
+// static
+user_manager::UserList
+ChromeUserManager::GetUsersAllowedAsSupervisedUserManagers(
+    const user_manager::UserList& user_list) {
+  user_manager::UserList result;
+  for (user_manager::User* user : user_list) {
+    if (user->GetType() == user_manager::USER_TYPE_REGULAR) {
+      result.push_back(user);
+    }
+  }
+  return result;
+}
+
 }  // namespace chromeos