tree a70edd6bbe7ec797e929622fce42a4d623cd250c
parent a685322effce973893f0420c8df261417fa430c5
author bnc <bnc@google.com> 1620401556 -0700
committer Copybara-Service <copybara-worker@google.com> 1620401591 -0700

Use circular deque in QpackDecoderHeaderTable.

This will require much fewer allocations than std::deque, with a bounded memory
usage (because the dynamic table size is bounded).  Note that HPACK decoder
already uses a circular deque (see http2::HpackDecoderDynamicTable::table_).

Keep using std::deque in QpackEncoderHeaderTable.
The same container is used in the HPACK encoder spdy::HpackHeaderTable.

PiperOrigin-RevId: 372561109
Change-Id: I73761ff632ceda9f5c9ea6727f5bed73f19ea9e8