Bug 950241 - Add update restart flag to metro utils.
Bug 950241 - MetroAppShell restart params.
Bug 950241 - CEHHelper changes.
Bug 950241 - Get rid of delayed restart logic now that we restart after xpcom shutdown.
Bug 950241 - Replace misc. restart boolean flags and cleanup CEH Execute.
Bug 950241 - Update updater metro check to use new command line param.
Bug 950241 - Flag update restarts in metro utils.