It creates new nsRemoteService instance which is parent (proxy) class which is registered as global nsIRemoteService. It provides basic functionality (watch observer for shutdown, launch firefox instance by HandleCommandLine()) for child services which are system specific. nsDBusRemoteService listens on DBus interface and it's available on DBus enabled systems only. nsGtkRemoteService is the former one based on X window propery mechanism.
MozReview-Commit-ID: GHpXdjstwyY
