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This information is now readily available. Let's expose it. In practise we don't pace audio by default and the delay is ~0, however we can tell that this metric is working as intended by setting PacingController's pace_audio_ to true via the "WebRTC-Pacer-BlockAudio" field trial. In this case chrome://webrtc-internals/ plots neats graphs for audio send delay. Bug: webrtc:10635 Change-Id: Iecfd93bb84ec61e5d54232769a9e7a500601b199 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/280523 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38483}