Pass camera facing info to audio client

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 a4f9cc39eb1c86e1f557eee57f94f4924e115ae3..37ecf40147f4fe250b40a1226397a8163411c288 100644
--- a/chromeos/audio/cras_audio_handler.h
+++ b/chromeos/audio/cras_audio_handler.h
@@ -21,6 +21,7 @@
 #include "chromeos/dbus/cras_audio_client.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "chromeos/dbus/volume_state.h"
+#include "component/arc/video_facing.h"
 
 namespace chromeos {
 
@@ -28,7 +29,8 @@ class AudioDevicesPrefHandler;
 
 class CHROMEOS_EXPORT CrasAudioHandler : public CrasAudioClient::Observer,
                                          public AudioPrefObserver,
-                                         public SessionManagerClient::Observer {
+                                         public SessionManagerClient::Observer,
+                                         public component::VideoCaptureObserver {
  public:
   typedef std::priority_queue<AudioDevice,
                               std::vector<AudioDevice>,
@@ -103,6 +105,9 @@ class CHROMEOS_EXPORT CrasAudioHandler : public CrasAudioClient::Observer,
   // Gets the global instance. Initialize must be called first.
   static CrasAudioHandler* Get();
 
+  void OnVideoCaptureStarted(component::VideoFacingMode facing) override;
+  void OnVideoCaptureStopped(component::VideoFacingMode facing) override;
+
   // Adds an audio observer.
   virtual void AddAudioObserver(AudioObserver* observer);