OutputMuteChanged  215 chromeos/dbus/cras_audio_client.cc     FOR_EACH_OBSERVER(Observer, observers_, OutputMuteChanged(user_mute));
OutputMuteChanged   28 chromeos/dbus/cras_audio_client.h     virtual void OutputMuteChanged(bool mute_on);
OutputMuteChanged   93 chromeos/dbus/cras_audio_client_stub_impl.cc                     OutputMuteChanged(volume_state_.output_user_mute));