Move a null check before it's usage.

chrome/browser/ui/ash/multi_user/multi_user_context_menu_chromeos.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/ui/ash/multi_user/multi_user_context_menu.h"
 
 #include "ash/multi_profile_uma.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 60 matching lines @@
   }
 }
 
 }  // namespace
 
 scoped_ptr<ui::MenuModel> CreateMultiUserContextMenu(
     aura::Window* window) {
   scoped_ptr<ui::MenuModel> model;
   ash::SessionStateDelegate* delegate =
       ash::Shell::GetInstance()->session_state_delegate();
+  if (!delegate)
+    return model.Pass();
+
   int logged_in_users = delegate->NumberOfLoggedInUsers();
-  if (delegate && logged_in_users > 1) {
+  if (logged_in_users > 1) {
     // If this window is not owned, we don't show the menu addition.
     chrome::MultiUserWindowManager* manager =
         chrome::MultiUserWindowManager::GetInstance();
     const std::string user_id = manager->GetWindowOwner(window);
     if (user_id.empty() || !window ||
         manager->GetWindowOwner(window).empty())
       return model.Pass();
     MultiUserContextMenuChromeos* menu =
         new MultiUserContextMenuChromeos(window);
     model.reset(menu);
     for (int user_index = 1; user_index < logged_in_users; ++user_index) {
       menu->AddItem(
           user_index == 1 ? IDC_VISIT_DESKTOP_OF_LRU_USER_2 :
                             IDC_VISIT_DESKTOP_OF_LRU_USER_3,
           l10n_util::GetStringFUTF16(IDS_VISIT_DESKTOP_OF_LRU_USER,
                                      delegate->GetUserDisplayName(
                                          user_index)));
     }
   }
   return model.Pass();
 }