tree 112a69fcde749703517ea9ce4bd967161e03e690
parent b2f576dc7eb10d0763b1c3807e6109acec05be78
author bnc <bnc@google.com> 1605055171 -0800
committer Copybara-Service <copybara-worker@google.com> 1605055243 -0800

Implement new PRIORITY_UPDATE frame.

PRIORITY_UPDATE frame type and wire format has changed in
https://tools.ietf.org/html/draft-ietf-httpbis-priority-02.  Implement new frame
for request streams, but not the one for push streams since that is currently
unused.

Protected by FLAGS_quic_reloadable_flag_quic_new_priority_update_frame.

PiperOrigin-RevId: 341724034
Change-Id: I42e63bbb84c62f54abc28989e9eaa24685ef1596