ref: c681887652abbf750f72f11e35d37a86f42e1fb8
parent: 7fa3deb1f5a4d131e590b871bc2012f54bb5379b
author: Yaowu Xu <yaowu@google.com>
date: Thu Dec 13 09:51:27 EST 2012
fixed build issue with round() not defined in msvc Change-Id: I8fe8462a0c2f636d8b43c0243832ca67578f3665