Pass camera facing info to audio client

chromeos/audio/cras_audio_handler.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/audio/cras_audio_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 108 matching lines @@
   return g_cras_audio_handler != NULL;
 }
 
 // static
 CrasAudioHandler* CrasAudioHandler::Get() {
   CHECK(g_cras_audio_handler)
       << "CrasAudioHandler::Get() called before Initialize().";
   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);
 }
 
 void CrasAudioHandler::RemoveAudioObserver(AudioObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 bool CrasAudioHandler::HasKeyboardMic() {
   return GetKeyboardMic() != NULL;
@@ skipping 1270 matching lines @@
                      hdmi_rediscover_grace_period_duration_in_ms_),
       this, &CrasAudioHandler::UpdateAudioAfterHDMIRediscoverGracePeriod);
 }
 
 void CrasAudioHandler::SetHDMIRediscoverGracePeriodForTesting(
     int duration_in_ms) {
   hdmi_rediscover_grace_period_duration_in_ms_ = duration_in_ms;
 }
 
 }  // namespace chromeos