Adding codecs to the RtpParameters returned by an RtpSender.

webrtc/media/engine/webrtcvideoengine2.h

Index: webrtc/media/engine/webrtcvideoengine2.h
diff --git a/webrtc/media/engine/webrtcvideoengine2.h b/webrtc/media/engine/webrtcvideoengine2.h
index b9ab0b71ed6f41dcd277c1e83dfcd211cc3c1b28..36c70d0e56082b9d04f6de7618b755a24e15b130 100644
--- a/webrtc/media/engine/webrtcvideoengine2.h
+++ b/webrtc/media/engine/webrtcvideoengine2.h
@@ -380,6 +380,7 @@ class WebRtcVideoChannel2 : public VideoMediaChannel, public webrtc::Transport {
     // entire channel.
     VideoSendStreamParameters parameters_ GUARDED_BY(lock_);
     // Contains settings that are unique for each stream, such as max_bitrate.
+    // Does *not* contain codecs, however.

[Taylor Brandstetter, 2016/04/14 00:37:36]

As RtpParameters grows bigger, I don't know that it makes sense to store it
here. We have two structs (RtpParameters, VideoSendParameters) that contain
duplicate information. Why not put everything in VideoSendParameters, and
generate the RtpParameters from it on the fly?

     // TODO(skvlad): Move ssrcs_ and ssrc_groups_ into rtp_parameters_.
     // TODO(skvlad): Combine parameters_ and rtp_parameters_ once we have only
     // one stream per MediaChannel.