[webrtc-stats] Need to relate all timestamps to Unix time (#600)

alvestrand has just created a new issue for https://github.com/w3c/webrtc-stats:

== Need to relate all timestamps to Unix time ==
In the webrtc-pc spec, it is clear that the timestamp on a stats record is based on Unix time (https://w3c.github.io/webrtc-pc/#dom-rtcstats-timestamp). It is also mentioned elsewhere (in CSRC) that the value is performance.now() + performance.timeOrigin.

We have however not said explicitly that this basis is used for all timestamps in stats. We should say that (once).


Please view or discuss this issue at https://github.com/w3c/webrtc-stats/issues/600 using your GitHub account


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