Make Notification factory function a member of NotificationPresenter so that we can create different types of notifications based on runtime conditions.

brightray/browser/linux/libnotify_notification.cc

@@ -55,12 +55,6 @@ void log_and_clear_error(GError* error, const char* context) {
 
 }  // namespace
 
-// static
-Notification* Notification::Create(NotificationDelegate* delegate,
-                                   NotificationPresenter* presenter) {
-  return new LibnotifyNotification(delegate, presenter);
-}
-
 // static
 bool LibnotifyNotification::Initialize() {
   if (!libnotify_loader_.Load("libnotify.so.4") &&  // most common one