tree 2a724fa1b9ce96e8c0e3b420d6e5c6e5bda731bd
parent aa5248f905727c5f6f61054f63ef195d07cf697b
author bnc <bnc@google.com> 1580409990 -0800
committer Copybara-Service <copybara-worker@google.com> 1580410030 -0800

Refactor MaybeSendPriorityUpdateFrame().

|priority_sent_| was used to make sure PRIORITY_UPDATE frame is sent with
initial headers but not with trailers.  Moving code from WriteHeadersImpl() to
WriteHeaders() achieves the same.  Also refactor code into
MaybeSendPriorityUpdateFrame() so that it can be reused in a future CL for
sending PRIORITY_UPDATE frame when priority changes after initial headers are
sent.

gfe-relnote: n/a, change to QUIC v99-only code.  Protected by existing disabled gfe2_reloadable_flag_quic_enable_version_99.
PiperOrigin-RevId: 292379616
Change-Id: Iad35e1a8698bf019b698fb39a7308758bd08b5fa