Pass camera facing info to audio client

media/capture/video/linux/video_capture_observer_chromeos.h

+// Copyright 2017 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.
+
+#ifndef MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_OBSERVER_CHROMEOS_H_
+#define MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_OBSERVER_CHROMEOS_H_
+
+#include "chromeos/audio/cras_audio_handler.h"
+#include "media/base/video_facing.h"
+
+namespace media {
+
+class VideoCaptureObserverChromeOS : public VideoCaptureObserver {
+ public:
+  VideoCaptureObserverChromeOS(chromeos::VideoCaptureObserver* observer);
+  VideoCaptureObserverChromeOS();
+  void OnVideoCaptureStarted(VideoFacingMode facing) override;
+  void OnVideoCaptureStopped(VideoFacingMode facing) override;
+
+ private:
+  chromeos::VideoCaptureObserver* const observer_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_OBSERVER_CHROMEOS_H_