Bug 944665: Part 1: Move common initialization routine into a function. r=khuey
Bug 944665: Part 2: Call PreloadSlowThings after Nuwa fork. r=khuey
Bug 922465: Automated test for nuwa process. r=khuey
Bug 930282: Part 1: Enable Nuwa by default. r=khuey
Bug 930282: Part 2: Mark PACMan thread and BackgroundHangMonitor thread. r=khuey
Bug 930282: Part 3: Don't fork after xpcom shutdown. r=khuey