This script will check that a webcam is running and start it if it's not currently running. It's tailored to the way our buildbots are currently configured. TEST=local execution on Windows, Mac and Linux. BUG=none R=phoglund@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1406005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@3981 4adac7df-926f-26a2-2b94-8c16560cd09d