Mirko Bonadei c0794c23ff Revert "stats: migrate to Timestamp"
This reverts commit 2235776597e2f47ec353ac911428eb9a54d64a10.

Reason for revert: Breaks compile.

RTCStatsReport::Create(timestamp) needs default value.

Original change's description:
> stats: migrate to Timestamp
>
> BUG=webrtc:13756
>
> Change-Id: I04ba57f9c2ca5a974a406814023911b4eb2d6d38
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/273942
> Commit-Queue: Philipp Hancke <phancke@microsoft.com>
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#38365}

Bug: webrtc:13756
Change-Id: I7eba2bb510af73be50397bd92f730bc6de1ce676
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/279044
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38369}
2022-10-12 14:23:40 +00:00
..
2019-01-28 11:17:00 +00:00