ash: Add checks for supervised users.

components/user_manager/user_manager.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 COMPONENTS_USER_MANAGER_USER_MANAGER_H_
 #define COMPONENTS_USER_MANAGER_USER_MANAGER_H_
 
 #include <string>
 
 #include "components/user_manager/user.h"
@@ skipping 271 matching lines @@
   virtual void RemoveObserver(Observer* obs) = 0;
 
   virtual void AddSessionStateObserver(UserSessionStateObserver* obs) = 0;
   virtual void RemoveSessionStateObserver(UserSessionStateObserver* obs) = 0;
 
   virtual void NotifyLocalStateChanged() = 0;
 
   // Returns true if supervised users allowed.
   virtual bool AreSupervisedUsersAllowed() const = 0;
 
+  // Force update login state.
+  virtual void ForceUpdateState() {}
+
  protected:
   // Sets UserManager instance.
   static void SetInstance(UserManager* user_manager);
 
   // Pointer to the existing UserManager instance (if any).
   // Usually is set by calling Initialize(), reset by calling Destroy().
   // Not owned since specific implementation of UserManager should decide on its
   // own appropriate owner. For src/chrome implementation such place is
   // g_browser_process->platform_part().
   static UserManager* instance;
 
  private:
   friend class chromeos::ScopedUserManagerEnabler;
 
   // Same as Get() but doesn't won't crash is current instance is NULL.
   static UserManager* GetForTesting();
 
   // Sets UserManager instance to the given |user_manager|.
   // Returns the previous value of the instance.
   static UserManager* SetForTesting(UserManager* user_manager);
 };
 
 }  // namespace user_manager
 
 #endif  // COMPONENTS_USER_MANAGER_USER_MANAGER_H_