Add LoginState class to src/chromeos/login

ash/system/user/login_status.h

 // Copyright (c) 2012 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.
 
 #ifndef ASH_SYSTEM_USER_LOGIN_STATUS_H_
 #define ASH_SYSTEM_USER_LOGIN_STATUS_H_
 
 #include "base/string16.h"
 
 namespace ash {
 namespace user {
 
 enum LoginStatus {
-  LOGGED_IN_LOCKED,           // A user has locked the screen.
-  LOGGED_IN_USER,             // A normal user is logged in.
-  LOGGED_IN_OWNER,            // The owner of the device is logged in.
+  LOGGED_IN_NONE,             // Not logged in
+  LOGGED_IN_LOCKED,           // A user has locked the screen
+  LOGGED_IN_USER,             // A regular user is logged in
+  LOGGED_IN_OWNER,            // The owner of the device is logged in
   LOGGED_IN_GUEST,            // A guest is logged in (i.e. incognito)
-  LOGGED_IN_RETAIL_MODE,      // Is in retail mode.
-  LOGGED_IN_PUBLIC,           // A public account is logged in.
-  LOGGED_IN_LOCALLY_MANAGED,  // A locally managed user is logged in.
-  LOGGED_IN_KIOSK_APP,        // Is in kiosk app mode.
-  LOGGED_IN_NONE,             // Not logged in.
+  LOGGED_IN_RETAIL_MODE,      // Is in retail mode
+  LOGGED_IN_PUBLIC,           // A public account is logged in
+  LOGGED_IN_LOCALLY_MANAGED,  // A locally managed user is logged in
+  LOGGED_IN_KIOSK_APP         // Is in kiosk app mode
 };
 
 string16 GetLocalizedSignOutStringForStatus(LoginStatus status, bool multiline);
 
 }  // namespace user
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_USER_LOGIN_STATUS_H_