ref: aeacaac574a51ec38bd89ca6fe5ab5f8f4106f66
parent: e8a4edf49e5e4d0ec409154009f1b9a970c8d2b0
author: Alex Converse <aconverse@google.com>
date: Fri Jun 20 06:36:18 EDT 2014
Switch active map implementation to segment based. Change-Id: Ibb841a1fa4d08d164cf5461246ec290f582b1f80