Bug 1000182, part 0 - Support unhandlable OOM in jit-test harness. r=terrence.
Bug 1000182, part 1 - Crash @js::ThreadSafeContext::onOutOfMemory with PJS and OOM. r=shu.
Bug 889897 - Add `mach jstestbrowser`. r=gps.
Bug 1020514 - Make mach colorize lines that start with REFTEST TEST-UNEXPECTED-FAIL etc. r=gps.