Fix some chromium-style warnings in webrtc/modules/audio_processing/

BUG=163
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1902004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4472 4adac7df-926f-26a2-2b94-8c16560cd09d
12 files changed