GitLab

This change records for each HTTPS navigation if the host has had hints
fetched for it recently. The change also removes expired entries from
the pref on update and limits the maximum number of hosts allowed to be
added to the pref controlled by a finch parameter.

Bug: 994931
Change-Id: Ia40f345a1d57994469823b5e757a4900c633ec2c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1762791Reviewed-by: Jesse Doherty <jwd@chromium.org>
Reviewed-by: Robert Ogden <robertogden@chromium.org>
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689569}