Frog dart:dom using interfaces and native implementation classes.

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

Index: client/dom/generated/src/frog/Attr.dart
diff --git a/client/dom/generated/src/frog/Attr.dart b/client/dom/generated/src/frog/Attr.dart
index 0084bcfc7c2de0f09d763e20b84f9133016e67f2..10bb596c5035d53ae4b63a1749bd6ce357d30a95 100644
--- a/client/dom/generated/src/frog/Attr.dart
+++ b/client/dom/generated/src/frog/Attr.dart
@@ -1,11 +1,11 @@
 
-class Attr extends Node native "*Attr" {
+class AttrJS extends NodeJS implements Attr native "*Attr" {
 
   bool get isId() native "return this.isId;";
 
   String get name() native "return this.name;";
 
-  Element get ownerElement() native "return this.ownerElement;";
+  ElementJS get ownerElement() native "return this.ownerElement;";
 
   bool get specified() native "return this.specified;";