Add LoginState class to src/chromeos/login

ash/system/user/login_status.h

Index: ash/system/user/login_status.h
diff --git a/ash/system/user/login_status.h b/ash/system/user/login_status.h
index c1e54f8c73163948c9fd5ed67cedeef46fadc7f7..c79f4450ab01a3a463a6eb28ada16a7f0c960708 100644
--- a/ash/system/user/login_status.h
+++ b/ash/system/user/login_status.h
@@ -11,15 +11,15 @@ 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);