Changing to use SleepMs throughout audio_device module.

Tested: Build audio_device_test_api and audio_device_test_func
Ran audio_device_test_api. Executed a random set of functions in
audio_device_test_func.

BUG=603

Review URL: https://webrtc-codereview.appspot.com/756008

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2664 4adac7df-926f-26a2-2b94-8c16560cd09d
7 files changed