tree f19bec43bc62b8b7192f469841220d1603770d82
parent d7d67633719300e34a5649d641f58f8a181f26fd
author bnc <bnc@google.com> 1561745379 -0700
committer Copybara-Service <copybara-worker@google.com> 1562120976 -0700

Use PeekRegion() instead of PrefetchNextRegion() in HTTP/3 streams.

Use PeekRegion() instead of PrefetchNextRegion() in QuicSpdyStream and
QuicReceiveControlStream.  Since offset is incremented after the ProcessInput()
call, not before, reentrancy has to be avoided in QuicSpdyStream.  (No such
issue in QuicReceiveControlStream because no HttpDecoder::Visitor implementation
methods can result in OnDataAvailable() being re-entered.

Unfortunately this is neither pretty nor simple, but necessary for blocked
decoding.

gfe-relnote: n/a, change in QUIC v99-only code path.
PiperOrigin-RevId: 255633598
Change-Id: I2d6d438c1e09837138e9301b10b2366f34e80790