Index: chromeos/dbus/cras_audio_client.h |
diff --git a/chromeos/dbus/cras_audio_client.h b/chromeos/dbus/cras_audio_client.h |
index 737d26663a2e00e7844237e6400e4ae76757f31a..be93eaf44f1d672db3d1a48f54288e0e1a9bf274 100644 |
--- a/chromeos/dbus/cras_audio_client.h |
+++ b/chromeos/dbus/cras_audio_client.h |
@@ -49,7 +49,7 @@ class CHROMEOS_EXPORT CrasAudioClient : public DBusClient { |
virtual void AddObserver(Observer* observer) = 0; |
virtual void RemoveObserver(Observer* observer) = 0; |
// Returns true if this object has the given observer. |
- virtual bool HasObserver(Observer* observer) = 0; |
+ virtual bool HasObserver(const Observer* observer) const = 0; |
// GetVolumeStateCallback is used for GetVolumeState method. It receives |
// 2 arguments, |volume_state| which containing both input and output volume |