GitLab

* Inline temps
* constexpr
* Format
* Shorten code
* Avoid unnecessary precision loss
* Improve naming
* Narrow scope

Bug: none
Change-Id: I457b636ca926654fb01e34f2d201e547d9070265
AX-Relnotes: n/a.
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359005Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798745}