The generated id was used to distinguish which encoder/decoder is injecting/extracting data. This feature is currently not used. Bug: webrtc:12630 Change-Id: Ie11fed7f7a3d1f1bc0eb0ad6e51b48170f512c2b Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/213343 Reviewed-by: Artem Titov <titovartem@webrtc.org> Commit-Queue: Jeremy Leconte <jleconte@google.com> Cr-Commit-Position: refs/heads/master@{#33598}