Make DOMType the root of DOM implementation types.

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

Index: client/dom/generated/src/frog/MutationRecord.dart
diff --git a/client/dom/generated/src/frog/MutationRecord.dart b/client/dom/generated/src/frog/MutationRecord.dart
index cb492aa7a55ad85c7f100d440bd866c39bdcb4db..23eecb89c4fcbca8b4ee2b28632cf4cae47fb852 100644
--- a/client/dom/generated/src/frog/MutationRecord.dart
+++ b/client/dom/generated/src/frog/MutationRecord.dart
@@ -1,25 +1,21 @@
 
-class MutationRecordJS implements MutationRecord native "*MutationRecord" {
+class MutationRecordJs extends DOMTypeJs implements MutationRecord native "*MutationRecord" {
 
-  NodeListJS get addedNodes() native "return this.addedNodes;";
+  NodeListJs get addedNodes() native "return this.addedNodes;";
 
   String get attributeName() native "return this.attributeName;";
 
   String get attributeNamespace() native "return this.attributeNamespace;";
 
-  NodeJS get nextSibling() native "return this.nextSibling;";
+  NodeJs get nextSibling() native "return this.nextSibling;";
 
   String get oldValue() native "return this.oldValue;";
 
-  NodeJS get previousSibling() native "return this.previousSibling;";
+  NodeJs get previousSibling() native "return this.previousSibling;";
 
-  NodeListJS get removedNodes() native "return this.removedNodes;";
+  NodeListJs get removedNodes() native "return this.removedNodes;";
 
-  NodeJS get target() native "return this.target;";
+  NodeJs get target() native "return this.target;";
 
   String get type() native "return this.type;";
-
-  var dartObjectLocalStorage;
-
-  String get typeName() native;
 }