Replace voice engine utility functions with system wrapper variants.

SLEEP -> SleepMs
GET_TIME_IN_MS -> TickTime::MillisecondTimestamp

These could cause unused function errors on some compilers.

BUG=1228

Review URL: https://webrtc-codereview.appspot.com/1013004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3326 4adac7df-926f-26a2-2b94-8c16560cd09d
8 files changed