ref: 14fc43825ec616c238494ce133425f2d5befad47
parent: 94a65e8fbaa3e50b686147b4dd75c79c2154c2d6
author: Yaowu Xu <yaowu@google.com>
date: Tue Jul 24 13:18:08 EDT 2018
Improve help message for arnr-type BUG=webm:1346 Change-Id: Ia6c1cee3704a6b44515d883b4d0632ac567bc9a2