ash: Replace SessionStateDelegate::CanAddUserToMultiProfile

ash/common/session/session_state_delegate.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 "ash/common/session/session_state_delegate.h"
 
 namespace ash {
 
 bool SessionStateDelegate::IsInSecondaryLoginScreen() const {
   return GetSessionState() == session_manager::SessionState::LOGIN_SECONDARY;
 }
 
-bool SessionStateDelegate::CanAddUserToMultiProfile(
-    SessionStateDelegate::AddUserError* error) const {
-  if (!IsMultiProfileAllowedByPrimaryUserPolicy()) {
-    if (error)
-      *error = ADD_USER_ERROR_NOT_ALLOWED_PRIMARY_USER;
-    return false;
-  }
-  if (NumberOfLoggedInUsers() >= GetMaximumNumberOfLoggedInUsers()) {
-    if (error)
-      *error = ADD_USER_ERROR_MAXIMUM_USERS_REACHED;
-    return false;
-  }
-  return true;
+AddUserSessionPolicy SessionStateDelegate::GetAddUserSessionPolicy() const {
+  if (!IsMultiProfileAllowedByPrimaryUserPolicy())
+    return AddUserSessionPolicy::ERROR_NOT_ALLOWED_PRIMARY_USER;
+
+  if (NumberOfLoggedInUsers() >= GetMaximumNumberOfLoggedInUsers())
+    return AddUserSessionPolicy::ERROR_MAXIMUM_USERS_REACHED;
+
+  return AddUserSessionPolicy::ALLOWED;
 }
 
 }  // namespace ash