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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef ASH_SYSTEM_USER_USER_OBSERVER_H_
      6 #define ASH_SYSTEM_USER_USER_OBSERVER_H_
      7 
      8 #include "ash/ash_export.h"
      9 
     10 namespace ash {
     11 
     12 class ASH_EXPORT UserObserver {
     13  public:
     14   virtual ~UserObserver() {}
     15 
     16   // A user got updated / changed.
     17   virtual void OnUserUpdate() = 0;
     18 
     19   // A user was added to the existing session.
     20   virtual void OnUserAddedToSession() = 0;
     21 };
     22 
     23 }  // namespace ash
     24 
     25 #endif  // ASH_SYSTEM_USER_USER_OBSERVER_H_
     26