Backed out changeset 3af927a8260c for suspected bustage on a CLOSED TREE

--HG--
extra : rebase_source : 4f69820605dd64ef6e89604749ad643138605fbe
Bug 839650: Remove assertion suppression from dom/media/tests/mochitest r=jsmith
Bug 842126: Avoid deadlock if we can't send an Open message r=mcmanus
Bug 843695: Make some DataChannels assertions fatal in opt/release r=derf,r=ted