Generate default constructors instead of factories.

lib/dom/templates/dom/native/dart_implementation.darttemplate

Index: lib/dom/templates/dom/native/dart_implementation.darttemplate
diff --git a/lib/dom/templates/dom/native/dart_implementation.darttemplate b/lib/dom/templates/dom/native/dart_implementation.darttemplate
index b4f540b5190b8551a9f33bda67192743d3731f3b..1c24cc716d8b00f9fa974f6f9da065ca4efb4130 100644
--- a/lib/dom/templates/dom/native/dart_implementation.darttemplate
+++ b/lib/dom/templates/dom/native/dart_implementation.darttemplate
@@ -8,8 +8,7 @@ interface _$INTERFACE {
 }
 
 class $CLASS extends $BASE implements _$INTERFACE {
-  static $CLASS _create$CLASS() => new $CLASS._create$CLASS();
-  $CLASS._create$CLASS();
+  $CLASS() {}
   String get typeName() => "$INTERFACE";
 $MEMBERS
 }