GitLab

The previous metric in this space,
SafeBrowsingBinaryUploadRequest.AdvancedProtectionScanVerdict
was removed by https://crrev.com/c/2505943, so take this opportunity
to re-implement it in a slightly more robust way, based on the trigger
rather than inspection of the Request.

Change-Id: Ib5418d3cba4eadb110503ca48d81aff7fe2e78aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2506572Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Dominique Fauteux-Chapleau <domfc@chromium.org>
Reviewed-by: Xinghui Lu <xinghuilu@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823383}