tree acff04f3ae9b1dc55e4f1f1a035e95203b69ed28
parent a0aeda52762c260297ccbd6afb4c170eba5dd485
author bnc <bnc@google.com> 1586800391 -0700
committer Copybara-Service <copybara-worker@google.com> 1586800436 -0700

gfe-relnote: Convert IETF RESET_STREAM error codes to and from QuicRstStreamErrorCode.  Protected by gfe2_reloadable_flag_quic_enable_version_draft_25_v3 and gfe2_reloadable_flag_quic_enable_version_draft_27.

IETF HTTP/3 error codes are different from Google QUIC's error codes, so some
information will be lost with IETF QUIC when translating QuicRstStreamErrorCode
to the wire and then back.  Only the main category (no error, cancelled,
protocol error) is preserved.

The advantage of keeping QuicRstStreamErrorCode and adding new values for IETF
error codes is that existing APIs, most notably QuicStream::error_code(), can be
kept without need for modification.  QuicStream::error_code() is almost exclusively
checked for QUIC_STREAM_NO_ERROR, QUIC_STREAM_CONNECTION_ERROR, and QUIC_STREAM_CANCELLED, the semantics of which are retained.

PiperOrigin-RevId: 306264118
Change-Id: I24f0aa810052ae42820623d5a55dfb9610db0a3c