tree e962eb4274b1d2c0eb9d068309fc198e8a1638a3
parent b83432560820d5599ef30ed61f276a0f00e86585
author QUICHE team <quiche-dev@google.com> 1556572794 -0700
committer Bence Béky <bnc@google.com> 1556578613 +0000

Send padding if there's nothing to retransmit in Quartc's SendProbingData().

If there is anything to retransmit, Quartc will use it for probing.  If not,
Quartc will simply send a packet full of padding.  (The latter will be useful
when Quartc only sends datagram frames.)

gfe-relnote: n/a (probing retransmissions only used by Quartc)
PiperOrigin-RevId: 245822135
Change-Id: Ia9ef50ba6cc649fc70530b64031d5ea19fcc9d24