Add AlternateProtocol to broken_altproto_list_ and map_.

Add AlternateProtocol (port and protocol) to
HttpServerPropertiesImpl::broken_alternate_protocol_list_ and
HttpServerPropertiesImpl::broken_alternate_protocol_list_ in preparation for
supporting multiple AlternateProtocols per host.  See draft at
https://crrev.com/665083009 for how this fits into a larger picture.

BUG=392575

Review URL: https://codereview.chromium.org/888943003

Cr-Commit-Position: refs/heads/master@{#314843}
2 files changed