Make DOMType the root of DOM implementation types.

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

Index: client/dom/generated/src/frog/ElementTraversal.dart
diff --git a/client/dom/generated/src/frog/ElementTraversal.dart b/client/dom/generated/src/frog/ElementTraversal.dart
index fad9c71d8921b821eba42913f749797ea0b32a3c..0c8cc30bcd27a52fd0295a8124e4c1aef1a9fdde 100644
--- a/client/dom/generated/src/frog/ElementTraversal.dart
+++ b/client/dom/generated/src/frog/ElementTraversal.dart
@@ -1,17 +1,13 @@
 
-class ElementTraversalJS implements ElementTraversal native "*ElementTraversal" {
+class ElementTraversalJs extends DOMTypeJs implements ElementTraversal native "*ElementTraversal" {
 
   int get childElementCount() native "return this.childElementCount;";
 
-  ElementJS get firstElementChild() native "return this.firstElementChild;";
+  ElementJs get firstElementChild() native "return this.firstElementChild;";
 
-  ElementJS get lastElementChild() native "return this.lastElementChild;";
+  ElementJs get lastElementChild() native "return this.lastElementChild;";
 
-  ElementJS get nextElementSibling() native "return this.nextElementSibling;";
+  ElementJs get nextElementSibling() native "return this.nextElementSibling;";
 
-  ElementJS get previousElementSibling() native "return this.previousElementSibling;";
-
-  var dartObjectLocalStorage;
-
-  String get typeName() native;
+  ElementJs get previousElementSibling() native "return this.previousElementSibling;";
 }