This TODO says this metric is only available for audio and should also be implemented for video, but ever since M76 this has been implemented for both audio and video (https://crbug.com/webrtc/10450). TBR=guido@webrtc.org, hta@webrtc.org NOTRY=True Bug: webrtc:10450 Change-Id: Icf2b60fdacae606c66f9d03492f107df9e32ba33 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168343 Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30485}