chromeos/audio/audio_pref_observer.h

   1 // Copyright (c) 2013 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 CHROMEOS_AUDIO_AUDIO_PREF_OBSERVER_H_
   6 #define CHROMEOS_AUDIO_AUDIO_PREF_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "chromeos/chromeos_export.h"
  11
  12 class PrefRegistrySimple;
  13
  14 namespace chromeos {
  15
  16 // Interface for observing audio preference changes.
  17 class CHROMEOS_EXPORT AudioPrefObserver {
  18  public:
  19   // Called when audio policy prefs changed.
  20   virtual void OnAudioPolicyPrefChanged() = 0;
  21
  22  protected:
  23   virtual ~AudioPrefObserver() {}
  24 };
  25
  26 }  // namespace chromeos
  27
  28 #endif  // CHROMEOS_AUDIO_AUDIO_PREF_OBSERVER_H_