a204ad210d
follow-up from https://webrtc-review.googlesource.com/c/src/+/262810 * replace Time::Millis(0) and TimeDelta::Millis(0) with ::Zero() * drop unnecessary webrtc namespace from some TimeDeltas * make TimeDelta do the unit conversion for stats BUG=webrtc:13756 Change-Id: Ic60625ae0fc7959a47a6be9f5051851feaf76373 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265875 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37664}