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This is a possible cause for a failure being seen in the field in the
associated bug; this change is a quick fix for that failure + UMA to
determine if the failure is real.

BUG=416639
R=mef@chromium.org
R=asvitkine@chromium.org

Review URL: https://codereview.chromium.org/597633002

Cr-Commit-Position: refs/heads/master@{#296241}