ref: 15ea853ccd534ef06908198529429ae893f3ca06
parent: 6796c0cfc3e51a181b0afec442a66dfaa5010ba6
parent: 866242bb09d76d2aa5e42e1e09bfa1a7a979cc99
author: Hui Su <huisu@google.com>
date: Wed Jan 30 13:17:11 EST 2019
Merge "Add some const qualifiers where applicable"