Pass camera facing info to audio client

media/capture/video/linux/video_capture_observer_chromeos.cc

+// 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.
+
+#include "media/capture/video/linux/video_capture_observer_chromeos.h"
+
+namespace {
+
+chromeos::VideoFacingMode ConvertVideoFacing(media::VideoFacingMode facing) {
+  switch (facing) {
+    case media::VideoFacingMode::MEDIA_VIDEO_FACING_NONE:
+    case media::VideoFacingMode::NUM_MEDIA_VIDEO_FACING_MODE:
+      return chromeos::VideoFacingMode::NONE;
+    case media::VideoFacingMode::MEDIA_VIDEO_FACING_USER:
+      return chromeos::VideoFacingMode::USER;
+    case media::VideoFacingMode::MEDIA_VIDEO_FACING_ENVIRONMENT:
+      return chromeos::VideoFacingMode::ENVIRONMENT;
+  }
+  return chromeos::VideoFacingMode::NONE;
+}
+}
+
+namespace media {
+
+VideoCaptureObserverChromeOS::VideoCaptureObserverChromeOS(
+    chromeos::VideoCaptureObserver* observer)
+    : observer_(observer) {}
+
+VideoCaptureObserverChromeOS::VideoCaptureObserverChromeOS()
+    : observer_(NULL) {}
+
+void VideoCaptureObserverChromeOS::OnVideoCaptureStarted(
+    VideoFacingMode facing) {
+  if (observer_ != NULL) {
+    observer_->OnVideoCaptureStarted(ConvertVideoFacing(facing));
+  }
+}
+
+void VideoCaptureObserverChromeOS::OnVideoCaptureStopped(
+    VideoFacingMode facing) {
+  if (observer_ != NULL) {
+    observer_->OnVideoCaptureStopped(ConvertVideoFacing(facing));
+  }
+}
+}