tree 779ab39ba6791f03a9e5c43e18568ecb33a9b286
parent 45af7517c8235489302d15b5d302a692e215ab26
author bnc <bnc@google.com> 1570556273 -0700
committer Copybara-Service <copybara-worker@google.com> 1570556303 -0700

Coalesce QPACK encoder stream writes in QpackEncoderStreamSender.

gfe-relnote: n/a, change to QUIC v99-only code.  Protected by existing disabled gfe2_reloadable_flag_quic_enable_version_99.
PiperOrigin-RevId: 273553497
Change-Id: Ia68206d3ff10995e722e2ba87c84e7047bb418f4