GitLab

Use linked hash map for broken alternative service queue in
HttpServerPropertiesImpl.  This container has efficient lookup by key, allowing
us to use it as the definitive set of broken alternative services in an upcoming
CL.

Also rename broken_alternate_protocol_map_ to
recently_broken_alternative_services_ for consistency and because it makes more
sense.

BUG=392576

Review URL: https://codereview.chromium.org/989253005

Cr-Commit-Position: refs/heads/master@{#319764}