Pass camera facing to WebKit

content/renderer/media/media_stream_video_capturer_source.cc

Index: content/renderer/media/media_stream_video_capturer_source.cc
diff --git a/content/renderer/media/media_stream_video_capturer_source.cc b/content/renderer/media/media_stream_video_capturer_source.cc
index 8734698c46c9f91c78988fa4c8474a0107bc4c38..9e9b618c9a2c848bbf2d9833926268a2436925e4 100644
--- a/content/renderer/media/media_stream_video_capturer_source.cc
+++ b/content/renderer/media/media_stream_video_capturer_source.cc
@@ -216,6 +216,7 @@ class LocalVideoCapturerSource final : public media::VideoCapturerSource {
   void MaybeSuspend() override;
   void Resume() override;
   void StopCapture() override;
+  media::VideoFacingMode GetVideoFacing() const override;
 
  private:
   void OnStateUpdate(VideoCaptureState state);
@@ -226,6 +227,8 @@ class LocalVideoCapturerSource final : public media::VideoCapturerSource {
   // |session_id_| identifies the capture device used for this capture session.
   const media::VideoCaptureSessionId session_id_;
 
+  const VideoFacingMode facing_;
+
   VideoCaptureImplManager* const manager_;
 
   const base::Closure release_device_cb_;
@@ -256,6 +259,7 @@ class LocalVideoCapturerSource final : public media::VideoCapturerSource {
 LocalVideoCapturerSource::LocalVideoCapturerSource(
     const StreamDeviceInfo& device_info)
     : session_id_(device_info.session_id),
+      facing_(device_info.device.video_facing),
       manager_(RenderThreadImpl::current()->video_capture_impl_manager()),
       release_device_cb_(manager_->UseDevice(session_id_)),
       is_content_capture_(IsContentVideoCaptureDevice(device_info)),
@@ -347,6 +351,19 @@ void LocalVideoCapturerSource::StopCapture() {
   formats_enumerated_callback_.Reset();
 }
 
+media::VideoFacingMode LocalVideoCapturerSource::GetVideoFacing() const {
+  switch (facing_) {

[mcasas, 2017/01/11 22:24:58]

I'd add here 
  if (is_content_capture_)
    return media::VideoFacingMode::NONE;


https://cs.chromium.org/chromium/src/content/renderer/media/media_stream_vide...

so tab/desktop/window capture will not have a Facing
Mode (assuming this is what we want).

[shenghao, 2017/01/12 08:10:48]

Done.

+    case VideoFacingMode::MEDIA_VIDEO_FACING_USER:
+      return media::VideoFacingMode::USER;
+    case VideoFacingMode::MEDIA_VIDEO_FACING_ENVIRONMENT:
+      return media::VideoFacingMode::ENVIRONMENT;
+    case VideoFacingMode::MEDIA_VIDEO_FACING_NONE:
+    case VideoFacingMode::NUM_MEDIA_VIDEO_FACING_MODE:
+      return media::VideoFacingMode::USER;
+  }
+  return media::VideoFacingMode::USER;
+}
+
 void LocalVideoCapturerSource::OnStateUpdate(VideoCaptureState state) {
   DVLOG(3) << __func__ << " state = " << state;
   DCHECK(thread_checker_.CalledOnValidThread());
@@ -440,6 +457,10 @@ MediaStreamVideoCapturerSource::MediaStreamVideoCapturerSource(
 MediaStreamVideoCapturerSource::~MediaStreamVideoCapturerSource() {
 }
 
+media::VideoFacingMode MediaStreamVideoCapturerSource::GetVideoFacing() {
+  return source_->GetVideoFacing();
+}
+
 void MediaStreamVideoCapturerSource::RequestRefreshFrame() {
   source_->RequestRefreshFrame();
 }