ref: ff4f1c4b7663695aed883dc66221bb0899f11ac2
parent: 5b3a8563deb9341300354dced690ba4e390ee590
author: Jim Bankoski <jimbankoski@google.com>
date: Tue Nov 19 07:50:48 EST 2013
scan order / neighbors converted to lookup Change-Id: I64b189dfeee1cf3e90134a1a93497072f3361e5e