GitLab

This CL adds new events to record transport parameters,
and implements the right QuicConnectionDebugVisitor calls
to access the transport parameters. I've confirmed that
they show up in netlog locally.

R=nharper@chromium.org

Change-Id: I297c57c594eea349b46e40654063e8c9140e39f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2210783
Auto-Submit: David Schinazi <dschinazi@chromium.org>
Commit-Queue: Nick Harper <nharper@chromium.org>
Reviewed-by: Nick Harper <nharper@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770813}