relnote: Cache-align the buffer used in QuicFramer::ProcessPacket's on-stack fast path.
relnote: Cache-align the buffer used in QuicFramer::ProcessPacket's
on-stack fast path.

The optimized crypto algorithms operate best on aligned memory; saves
about 1.6% wall time and 2.4% CPU time in QUIC.

Merge internal change: 101040440

R=rch@chromium.org

Review URL: https://codereview.chromium.org/1315163005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#345915}

CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend