Bug 926155 - Added reftest to verify that an element contained within a sticky element that is also a scroll container will be reflowed correctly when updated. r=dholbert

This test verifies that the reflow will not be interrupted by a sticky element that is also a scroll container.
Bug 942367 - Part 1: WebIDL changes for peerIdentity constraint. r=jib
Bug 942367 - Part 2: DOMMediaStream support for PeerIdentity. r=bholley, r=roc
Bug 942367 - Part 3: Stream isolation for WebRTC. r=jib, r=bholley
Bug 991040 - Uncaught async exceptions in mochitests now cause warnings. r=ted
Bug 997409 - Add set_thread_area to seccomp whitelist if available. r=kang