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Reuse was disabled in #317499 because CrOS corruption rates were spiking and
were too close to the stable branch point to gather more history.  Re-enabling
to allow monitoring in dev/beta channels with the hope that the rise we saw on
CrOS was normal fluctuations and unrelated to this change.

BUG=460568

Review URL: https://codereview.chromium.org/1023773003

Cr-Commit-Position: refs/heads/master@{#321427}