Make DOMType the root of DOM implementation types.

client/dom/generated/src/frog/Notification.dart

Index: client/dom/generated/src/frog/Notification.dart
diff --git a/client/dom/generated/src/frog/Notification.dart b/client/dom/generated/src/frog/Notification.dart
index bf7222873bb4bcfb4df6088a3c057a0653797caf..7b89c10756727ba0be6fa319bb3bb29ee0a40833 100644
--- a/client/dom/generated/src/frog/Notification.dart
+++ b/client/dom/generated/src/frog/Notification.dart
@@ -1,5 +1,5 @@
 
-class NotificationJS implements Notification native "*Notification" {
+class NotificationJs extends DOMTypeJs implements Notification native "*Notification" {
 
   String get dir() native "return this.dir;";
 
@@ -13,13 +13,9 @@ class NotificationJS implements Notification native "*Notification" {
 
   void cancel() native;
 
-  bool dispatchEvent(EventJS evt) native;
+  bool dispatchEvent(EventJs evt) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   void show() native;
-
-  var dartObjectLocalStorage;
-
-  String get typeName() native;
 }