GitLab

Remove the thread check that would never pass and make the variable
that is used by multiple threads thread safe.

Bug: 1142155
Change-Id: Iae33e15733eb78a47a664515e1abec671edbb64d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2495579Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: Oliver Li <olivierli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820817}