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With four retries, that's a total of up to 30s of sleeping.

Bug: 892670
Change-Id: I59a870316bbd98e707907dfcb53c82a53a7beab9
Reviewed-on: https://chromium-review.googlesource.com/c/1291711Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601230}