Ivan Molodetskikh bc7c56fa74 clutter/frame-clock: Always update last presentation time
Last presentation time is mainly used to make sure predicted
presentation time is aligned with display refreshes. Even if it went
back in time, there will be no issue as next presentation time takes
current time into account. Synthetic presentation time is not exactly
aligned with display refreshes, so using it would only result in
inconsistent animations.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1707>
2021-02-05 17:05:19 +00:00
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