standardized in https://github.com/w3c/webrtc-stats/pull/694 BUG=webrtc:13986 Change-Id: Ia24e7fa64a48ad6c88882c90fd03bd1d89408ea4 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/278789 Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Philipp Hancke <phancke@microsoft.com> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38390}