Adding trace and changing pacing constants

BUG=1721,1722
R=mikhal@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1380005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3940 4adac7df-926f-26a2-2b94-8c16560cd09d
7 files changed