ref: 7b54556008834a20a48f467c9a9a2705c9672452
parent: a82001b1cfd688601bbda9b08b3d20e9b46b14d4
parent: c807949408254556dfddfb365a3ad67db650df7d
author: Jingning Han <jingning@google.com>
date: Tue Oct 22 05:37:17 EDT 2013
Merge "Prevent left_block_mode stepping into left tile"