GitLab

- Simplify the code to improve readability.
- Correctly enables SABs at render process start in case we have
  the COI bit.

Bug: chromium:923807
Change-Id: I4f52ec30f76864200f8a92f109603b59eb11c8da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2582358Reviewed-by: Camille Lamy <clamy@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837083}