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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_VOLUME_CONTROL_DELEGATE_H_
      6 #define ASH_VOLUME_CONTROL_DELEGATE_H_
      7 
      8 namespace ui {
      9 class Accelerator;
     10 }  // namespace ui
     11 
     12 namespace ash {
     13 
     14 // Delegate for controlling the volume.
     15 class VolumeControlDelegate {
     16  public:
     17   virtual ~VolumeControlDelegate() {}
     18 
     19   virtual bool HandleVolumeMute(const ui::Accelerator& accelerator) = 0;
     20   virtual bool HandleVolumeDown(const ui::Accelerator& accelerator) = 0;
     21   virtual bool HandleVolumeUp(const ui::Accelerator& accelerator) = 0;
     22 };
     23 
     24 }  // namespace ash
     25 
     26 #endif  // ASH_VOLUME_CONTROL_DELEGATE_H_
     27