Index: chrome/browser/chromeos/audio/audio_handler.h |
diff --git a/chrome/browser/chromeos/audio/audio_handler.h b/chrome/browser/chromeos/audio/audio_handler.h |
index 69c0eba18fd0794ca1ee8ed4bfc7c12eb4ef2a4a..a66ea4d104e39385ebd036003cee3e60811c36f5 100644 |
--- a/chrome/browser/chromeos/audio/audio_handler.h |
+++ b/chrome/browser/chromeos/audio/audio_handler.h |
@@ -23,6 +23,7 @@ class AudioHandler { |
class VolumeObserver { |
public: |
virtual void OnVolumeChanged() = 0; |
+ virtual void OnMuteToggled() = 0; |
protected: |
VolumeObserver() {} |
virtual ~VolumeObserver() {} |