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This translation unit is using THREAD_CHECKER but not including the
header.

Change-Id: Ifb594fe48ef0e9b08f80b3fc9898325f5c0d4f95
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1725644
Auto-Submit: Carlos Caballero <carlscab@google.com>
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682558}