ChromeOS: Show the new POD RE-AUTH ICON when users needs to re-auth

chrome/browser/chromeos/login/screens/user_selection_screen.h

Index: chrome/browser/chromeos/login/screens/user_selection_screen.h
diff --git a/chrome/browser/chromeos/login/screens/user_selection_screen.h b/chrome/browser/chromeos/login/screens/user_selection_screen.h
index 7b9c684e59acae880f6298c8478ec588b96578d0..d1a42db7a01b14032a279224147a3833c3307dc5 100644
--- a/chrome/browser/chromeos/login/screens/user_selection_screen.h
+++ b/chrome/browser/chromeos/login/screens/user_selection_screen.h
@@ -123,7 +123,15 @@ class UserSelectionScreen
   EasyUnlockService* GetEasyUnlockServiceForUser(
       const std::string& user_id) const;
 
-  void OnUserStatusChecked(const user_manager::UserID& user_id,
+  // Returns true if user check has started possible, otherwise it returns
+  // false. Note, that "false" may be a temporary status, as other check
+  // request for this user might be in progress.
+  bool CheckUserStatusImpl(const std::string& user_id, bool check_all_users);

[Denis Kuznetsov (DE-MUC), 2015/06/25 18:43:42]

This approach does not give any guarantees.
Please use following (common async) approach:
CheckUserStatus(UserID userid, Callback<void(UserID, bool)> check_callback);

[Alexander Alekseev, 2015/06/30 20:43:39]

Common approach will not work here, as TokenHandle doesn't support several
simultaneous requests for one user.
But I've changed "check all" implementation.

+
+  void CheckNextUserStatus(const std::string& current_user_id);
+
+  void OnUserStatusChecked(bool check_all_users,
+                           const user_manager::UserID& user_id,
                            TokenHandleUtil::TokenHandleStatus status);
 
   // Whether to show guest login.