[Sampling profiler] Add CHECKS to help root cause crash

Adds CHECKs for the individual OpenThread permissions bits to
understand which is trigging the crash in the associated bug.

Bug: 947459
Change-Id: I65e3f932acbfaf3cb16929adf8fc3e20fa9bc121
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1621630
Commit-Queue: Mike Wittman <wittman@chromium.org>
Auto-Submit: Mike Wittman <wittman@chromium.org>
Reviewed-by: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661828}
1 file changed