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They're cool and efficient. This should be more efficient at runtime but
approximately as readable in the source text.

Change-Id: Id8b8a2b1c8b869c4a3f22326bfa381fb67b3de13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2562819
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Auto-Submit: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#831951}