static isSupported() {
		return isWin7;
	}
Chromium Rich Notifications
  https://developer.chrome.com/apps/richNotifications

Used on Windows 7, due to the lack of a native notification system.
Native notifications on Windows 8 and above require the snoretoast provider as long as Chromium
doesn't support them. Rich notifications are being used as a fallback.

@class NotificationProviderRich
@implements NotificationProviderChromeNotifications
@implements NotificationProvider