Frog dart:dom using interfaces and native implementation classes.

frog/gen.dart

Index: frog/gen.dart
diff --git a/frog/gen.dart b/frog/gen.dart
index 16bb6c22b78ddd226299b6d633fa4ff6b55935a3..fd8f691c4f6397f480c1a756eac03b8056bfb83f 100644
--- a/frog/gen.dart
+++ b/frog/gen.dart
@@ -332,7 +332,7 @@ class WorldGenerator {
     writeType(type.genericType);
     // Ensure parent has been written before the child. Important ordering for
     // IE when we're using $inherits, since we don't have __proto__ available.
-    if (type.parent !=  null && !type.isNative) {
+    if (type.parent !=  null) {
       writeType(type.parent);
     }