Make DOMType the root of DOM implementation types.

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

Index: client/dom/generated/src/frog/TextTrackList.dart
diff --git a/client/dom/generated/src/frog/TextTrackList.dart b/client/dom/generated/src/frog/TextTrackList.dart
index 13fb544a95a04a286f505ebbd7b3fa7a5abb1dbc..348804a3036a66948228827e010e255161fa5ee7 100644
--- a/client/dom/generated/src/frog/TextTrackList.dart
+++ b/client/dom/generated/src/frog/TextTrackList.dart
@@ -1,5 +1,5 @@
 
-class TextTrackListJS implements TextTrackList native "*TextTrackList" {
+class TextTrackListJs extends DOMTypeJs implements TextTrackList native "*TextTrackList" {
 
   int get length() native "return this.length;";
 
@@ -9,13 +9,9 @@ class TextTrackListJS implements TextTrackList native "*TextTrackList" {
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
-  bool dispatchEvent(EventJS evt) native;
+  bool dispatchEvent(EventJs evt) native;
 
-  TextTrackJS item(int index) native;
+  TextTrackJs item(int index) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  var dartObjectLocalStorage;
-
-  String get typeName() native;
 }