Instead dependency descriptor can be used to communicate discardability Bug: webrtc:11358 Change-Id: I46b4f551acd002d4355d18033e03d8181ec94c6e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172922 Reviewed-by: Markus Handell <handellm@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31004}