Do not notify Volume change event to CrasAudioHandler::Observer when CrasAudioHandler change volume…

chromeos/audio/cras_audio_handler.h

Index: chromeos/audio/cras_audio_handler.h
diff --git a/chromeos/audio/cras_audio_handler.h b/chromeos/audio/cras_audio_handler.h
index 177e9e2f54e209c79add320456d465c20231adb6..32ad3dc74a3a131b1c4ae9980a6bffb9b3407691 100644
--- a/chromeos/audio/cras_audio_handler.h
+++ b/chromeos/audio/cras_audio_handler.h
@@ -432,6 +432,10 @@ class CHROMEOS_EXPORT CrasAudioHandler : public CrasAudioClient::Observer,
 
   bool cras_service_available_ = false;
 
+  bool initializing_audio_state_ = false;
+  int init_volume_;
+  uint64_t init_node_id_;
+
   base::WeakPtrFactory<CrasAudioHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CrasAudioHandler);