Backed out bug 789897 due to regressions.
Bug 837035 - Support DataChannels with SDP Negotiation r=jesup
Bug 855586 - Patch in bug 824642 has wrong logic. r=nical.bugzilla
Bug 839788 - Switch Browse button from an <input> to a <button>. r=bz
Bug 837323 - Bustage followup; r=me
Bug 855730 - Logging patch to see if I can determine the cause of the failures in bug 840388's mochitests. r=smaug