ref: 9904c28f5b421592db61b337cd7700544820ba26
parent: 965d8686bb2c192b2f1a1b3e6c4e5aca12d623a4
author: Yunqing Wang <yunqingwang@google.com>
date: Thu Jun 7 07:26:47 EDT 2012
Remove unused code in drop_frame Removed unused parameters and code related to drop_frame. Change-Id: I594e050d49b1805c6f72abf06005ef624256bb57