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This CL adds feature flags that causes Chrome to suppress suggestions,
votes and quality metrics based on profile data which has been flagged
as likely invalid.

This will allow Chrome Team to evaluate the utility of attempting to
filter out this data.

Bug: 835984
Change-Id: I63f51ac893d2bf657af9eb136d920cb0b7f2bddd
Reviewed-on: https://chromium-review.googlesource.com/998132
Commit-Queue: Roger McFarlane <rogerm@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556900}