Remove TCP FastOpen support.

We never enabled it by default, and have no plans to, so we should just
remove it.  QUIC also makes it less useful, and TLS 1.2 0-RTT session
restore means it potentially mutates state.

It also leaks also leaks data between profiles, including (but not
limited to) incognito profiles, since it relies on global system state.

Bug: 914007
Change-Id: Id9c333216661ee538cc6ce6e2b7f70b899393367
Reviewed-by: Matt Menke <>
Reviewed-by: Ryan Hamilton <>
Commit-Queue: Matt Menke <>
Cr-Commit-Position: refs/heads/master@{#615819}
37 files changed