ref: 888d0c82da0fd634aa8a03d6201540f343506d45
parent: 0d310de97b3ff1c865ad3259e0171ce3dd0cf76e
author: Yaowu Xu <yaowu@google.com>
date: Thu Apr 4 05:00:53 EDT 2013
make lf_deltas dependent on filter_lvl Change-Id: Idb0d11e3ae9afabe667a9f327bf4d3aa84f63649