Bug 1007709 - [Dialer][Call Screen] Create fluid size for contact name in the upper information panel

Yeah, the reason not to do it is that CallScreen.isStatusBarMode (which determines the STATUS_BAR scenario is a read only property (see https://github.com/mozilla-b2g/gaia/blob/master/apps/callscreen/js/call_screen.js#L102). On the other hand, the DIAL_PAD scenario (used by FontSizeManager) is set directly by the dialer which can only be in that scenario and I think it has not sense to include a test for it in the Call Screen. Are you OK with the explanation? :)