GitLab

Chromotocol uses STUN and TURN services provided by the Talk server,
which won't be available after the XMPP->FTL migration.

This CL forces the host and playground to use TURNaaS when
FtlSignalStrategy is being used.

The host and client are able to connect via relay for the first time but
subsequent connection will fail until we wait for ~5 minutes. This is a
known issue to Chromotocol even when using GTURN, while WebRTC doesn't
seem to be affected, even when using it on mobile clients.

Bug: 955617
Change-Id: I3799fb316c9861a57c7c019d85843f9211ef8242
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584932
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654578}