Remove CanonicalCookie::FullCompare

It's only used in some tests, and for those PartialCompare is sufficient,
as it looks at all the fields for the key of the cookie database.

Change-Id: I8b7fa9f86a21e4ed9afc85bd2e1f89e246fef83f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678758
Reviewed-by: Lily Chen <chlily@chromium.org>
Commit-Queue: Maks Orlovich <morlovich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672672}
5 files changed