Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/html/generated/html/dartium/OptGroupElement.dart

+
+class _OptGroupElementImpl extends _ElementImpl implements OptGroupElement {
+  _OptGroupElementImpl._wrap(ptr) : super._wrap(ptr);
+
+  bool get disabled() => _wrap(_ptr.disabled);
+
+  void set disabled(bool value) { _ptr.disabled = _unwrap(value); }
+
+  String get label() => _wrap(_ptr.label);
+
+  void set label(String value) { _ptr.label = _unwrap(value); }
+}