tree 1465b60a654b5ccecaf20c0b464512619fa64453
parent 32bf514bd13fdcbbedc9e581d2b2cac41af5ab52
author vasilvv <vasilvv@google.com> 1602622029 -0700
committer Copybara-Service <copybara-worker@google.com> 1602622060 -0700

Replace QuicheOptional with absl::optional.

PiperOrigin-RevId: 336947387
Change-Id: I20fa90b62347b2fbb08e68db34a22cd182ef2b64