The pacer can thus run on the Worker thread or an owned TQ depending on field trial string "WebRTC-SendPacketsOnWorkerThread" Bug: webrtc:14502 Change-Id: Ic74b92b21371cc62c7b2f62f039bc800dcceef8c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/277622 Reviewed-by: Evan Shrubsole <eshr@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38301}