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This was behind a build flag but we also need it behind a switch
so it isn't running in production for no reason.

Bug: 1165517
Change-Id: I026e8a95a053efd000062c44b1ce7ff5e0aae845
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2638413Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844936}