tree 30242a143da22dc08ca689b2ce6f9a220540d813
parent aa1d6a80f81a5f805e0741cba79a0fe3ad5a54d6
author bnc <bnc@google.com> 1552511668 -0700
committer Copybara-Service <copybara-worker@google.com> 1552511701 -0700

Remove HttpDecoder::has_payload().

Instead of polling has_payload(), query QuicSpdyStreamBodyBuffer::HasBytesToRead().
Note the subtle change in behavior: OnBodyAvailable() will be called even if there
is no new payload decoded but the consumer has not read all the buffer previously.

Also add DCHECKs to QuicSpdyStream() methods that are only supposed to be called
in v99.

gfe-relnote: n/a.  Other than adding a DCHECK, change behavior in QUIC v99 only.  Not flag protected.
PiperOrigin-RevId: 238306060
Change-Id: I044ea4c0e49064c5193958b44c6cee61eb15e08f