Remove |parse_alternative_service| flag.
|parse_alternative_service| is already true by default both in production and in
tests.
* Remove flag from HttpNetworkSession::Params and SpdySessionDependencies.
* Remove "ParseAltSvc" field trial.
* Remove Alternate-Protocol parsing code.
* Remove tests testing Alternate-Protocol that had Alt-Svc counterparts.
* Change tests to test Alt-Svc if no such test existed yet.
BUG=581331
Review-Url: https://codereview.chromium.org/2011983002
Cr-Commit-Position: refs/heads/master@{#396643}
22 files changed
