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

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

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 105 matching lines @@
 
   // Map from public session user IDs to recommended locales set by policy.
   typedef std::map<std::string, std::vector<std::string> >
       PublicSessionRecommendedLocaleMap;
   PublicSessionRecommendedLocaleMap public_session_recommended_locales_;
 
  private:
   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.
   bool show_guest_;
 
   // Purpose of the screen (see constants in OobeUI).
   const std::string display_type_;
 
   // Set of Users that are visible.
   user_manager::UserList users_;
@@ skipping 10 matching lines @@
   scoped_ptr<TokenHandleUtil> token_handle_util_;
 
   base::WeakPtrFactory<UserSelectionScreen> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserSelectionScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_