GitLab

Should be capable of handling strictly more cases than the previous
logic in DnsResponse, because CNAME validation has less assumptions on
the order of received records.

Bug: 1147247
Change-Id: Ie1a515806a17d9ba95f2b368b274cf8356c796c9
Fixed: 640596
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536270
Commit-Queue: Eric Orth <ericorth@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828620}