This will handle the scenario where, for example, the initial
offer/answer only negotiates audio, and video is added later (to the
same stream). Previously, there was absolutely no way to get a handle to
the new track without hacking the SDP. Now, the stream will be updated
after setRemoteDescription finishes.
Bug: webrtc:5677
Change-Id: Iea31bb7744da6b82afdaf44c8f74d721298a9474
Reviewed-on: https://webrtc-review.googlesource.com/6261
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20228}
ebe36efad7