GitLab

~InProcessUtilityThread calls Stop(), which calls
PlatformThread::Join().

So it needs to use ScopedAllowBaseSyncPrimitivesOutsideBlockingScope
instead of ThreadRestrictions::SetIOAllowed(true).

Change-Id: Idf729959a1a1d77902a623806560b1cc86299e6f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1637613Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665038}