GitLab

> Added incident report for variations seed signature mismatch.
>
> - Keep record of a bad signature in VariationsSeedStore::LoadSeed.
> - Register VerifyVariationsSeedSignature in SafeBrowsingService::RegisterAllDelayedAnalysis to send an incident report, if a bad signature is encountered.
>
> BUG=423467
>
> Review URL: https://codereview.chromium.org/646733002
>
> Cr-Commit-Position: refs/heads/master@{#299964}

This reverts commit 37907039 because it
accesses g_browser_process->variations_service() off of the main thread,
leading to a DCHECK.

BUG=423467
TBR=grt@chromium.org

Review URL: https://codereview.chromium.org/664333002

Cr-Commit-Position: refs/heads/master@{#300479}