Make sure channels in the same call are in the same channel group.

Tested manually. I'll make a follow CL with a proper test once review.webrtc.org/5619004 has been committed.

R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/5509004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5280 4adac7df-926f-26a2-2b94-8c16560cd09d
6 files changed