This reverts commit 9173e017.

Reason for revert: This was in a chain of reverts, but is unrelated to the issue.

Original change's description:
> Revert "Cleanup translator option checks"
>
> 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/+/2634047
> Reviewed-by: Tim Van Patten <timvp@google.com>
> Commit-Queue: Tim Van Patten <timvp@google.com>

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

Bug: angleproject:3606
Change-Id: I10ecca63a3db6dbc3ddedf5bb7e5319a82a80a30
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2633712
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>