Pass camera facing info to audio client

chromeos/audio/cras_audio_handler.cc

Index: chromeos/audio/cras_audio_handler.cc
diff --git a/chromeos/audio/cras_audio_handler.cc b/chromeos/audio/cras_audio_handler.cc
index a6cd9f0e30cfb0d1b64cde3c3ec24acd318642a2..444eab643cbb4ab81cc8aef0975e9c0b7199c49c 100644
--- a/chromeos/audio/cras_audio_handler.cc
+++ b/chromeos/audio/cras_audio_handler.cc
@@ -126,6 +126,14 @@ CrasAudioHandler* CrasAudioHandler::Get() {
   return g_cras_audio_handler;
 }
 
+void CrasAudioHandler::OnVideoCaptureStarted(media::VideoFacingMode facing) {
+  // TODO(jennyz): Switch active audio device according to video facing.
+}
+
+void CrasAudioHandler::OnVideoCaptureStopped(media::VideoFacingMode facing) {
+  // TODO(jennyz): Switch active audio device according to video facing.
+}
+
 void CrasAudioHandler::AddAudioObserver(AudioObserver* observer) {
   observers_.AddObserver(observer);
 }