We need to choose a checking revision from webrtc.org to base our demo on.
Probably a version used for a Chromium or Chrome Canary build would be good.
We've gone with rev 1538 (currently in the tree). They suggested 1877 (snapshotted for the next Chrome) plus patch 1884, and rev 124 of libjingle, but we couldn't get a consistent, buildable copy of all the pieces needed in time. (Bugs in gclient, etc)