Add LoginState class to src/chromeos/login

ash/system/user/tray_user.cc

 // 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.
 
 #include "ash/system/user/tray_user.h"
 
 #include <algorithm>
 #include <climits>
 #include <vector>
 
@@ skipping 595 matching lines @@
 
 void TrayUser::DestroyDetailedView() {
 }
 
 void TrayUser::UpdateAfterLoginStatusChange(user::LoginStatus status) {
   switch (status) {
     case user::LOGGED_IN_LOCKED:
     case user::LOGGED_IN_USER:
     case user::LOGGED_IN_OWNER:
     case user::LOGGED_IN_PUBLIC:
-    case user::LOGGED_IN_LOCALLY_MANAGED:

[bartfab (slow), 2013/04/05 13:16:33]

Please restore this. Locally managed mode is in flux, this is why you do not see
it being set anywhere right now.

[stevenjb, 2013/04/05 18:17:15]

Done.

       avatar_->SetImage(
           ash::Shell::GetInstance()->system_tray_delegate()->GetUserImage(),
           gfx::Size(kUserIconSize, kUserIconSize));
       avatar_->SetVisible(true);
       break;
 
     case user::LOGGED_IN_GUEST:
       label_->SetVisible(true);
       break;
 
@@ skipping 35 matching lines @@
   // Check for null to avoid crbug.com/150944.
   if (avatar_) {
     avatar_->SetImage(
         ash::Shell::GetInstance()->system_tray_delegate()->GetUserImage(),
         gfx::Size(kUserIconSize, kUserIconSize));
   }
 }
 
 }  // namespace internal
 }  // namespace ash