GitLab

* Shorten code
* Use const more
* Inline temps
* Use safe conversions for float -> int
* TimeDelta::InMicrosecondsF() returns a double


Bug: none
Change-Id: I798ee7107bcbda863f95ee7921c4ddfd76768183
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359008
Commit-Queue: Cait Phillips <caitkp@chromium.org>
Reviewed-by: Cait Phillips <caitkp@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799616}