ref: 417e754f56ff25db01795f06578e2fe4451c164c
parent: e97f404e5242b4b5f4bec005ed1c7a11a7ebf74b
parent: 10da059b522369533d5d9bbd65c939bb79ca9432
author: Jingning Han <jingning@google.com>
date: Thu Nov 6 07:03:15 EST 2014
Merge "Remove unused is_background function"