ref: a4c3e2e4f26b5f76ca75aa994c9466644bae6bdd
parent: 5053845a70de37291dfae8258a33041bcd15e4d9
author: Dmitry Kovalev <dkovalev@google.com>
date: Thu Apr 10 13:45:07 EDT 2014
Cleaning up optimize_b(). Change-Id: I81eb1e931e00acfcb65f824e394bbe7795d6deaa