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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_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_OBSERVER_H_
      6 #define ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_OBSERVER_H_
      7 
      8 #include "ash/ash_export.h"
      9 
     10 namespace ash {
     11 
     12 class ASH_EXPORT DesktopBackgroundControllerObserver {
     13  public:
     14   // Invoked when the wallpaper data is changed.
     15   virtual void OnWallpaperDataChanged() = 0;
     16 
     17  protected:
     18   virtual ~DesktopBackgroundControllerObserver() {}
     19 };
     20 
     21 }  // namespace ash
     22 
     23 #endif  // ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_OBSERVER_H_
     24