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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_UPDATE_OBSERVER_H_
      6 #define ASH_SYSTEM_USER_UPDATE_OBSERVER_H_
      7 
      8 #include "ash/ash_export.h"
      9 
     10 namespace ash {
     11 
     12 class ASH_EXPORT UpdateObserver {
     13  public:
     14   enum UpdateSeverity {
     15     UPDATE_NORMAL,
     16     UPDATE_LOW_GREEN,
     17     UPDATE_HIGH_ORANGE,
     18     UPDATE_SEVERE_RED,
     19   };
     20 
     21   virtual ~UpdateObserver() {}
     22 
     23   virtual void OnUpdateRecommended(UpdateSeverity severity) = 0;
     24 };
     25 
     26 }  // namespace ash
     27 
     28 #endif  //ASH_SYSTEM_USER_UPDATE_OBSERVER_H_
     29