ref: 22cf82a14cec941e979d256cc6f15a542e70a71b
parent: e71adcd8341b3a2cbcb24054065ad8c2f6b81a2e
parent: c36f78b054db7633b2e3963d414fd205d7fea3c5
author: Jingning Han <jingning@google.com>
date: Wed Jul 30 06:05:03 EDT 2014
Merge "Use frame index directly in get_chessboard_index"