This reverts commit 9710c4e4.

Reason for revert:
Earlier CL breaks pre-rotation:
https://chromium-review.googlesource.com/c/angle/angle/+/2598584

Original change's description:
> Cleanup translator option checks
>
> Use comparison with 0 for explicit conversion to bool.
>
> Bug: angleproject:3606
> Change-Id: Ie0a76d7df829227c1376894535813b54e13491b4
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2631689
> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Charlie Lao <cclao@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>

TBR=syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com

Change-Id: Ib597a62f3c7078d28f7f5b79d1cc9f8d9e469c31
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:3606
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2634047Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Tim Van Patten <timvp@google.com>