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

client/html/generated/html/dartium/LabelElement.dart

+
+class _LabelElementImpl extends _ElementImpl implements LabelElement {
+  _LabelElementImpl._wrap(ptr) : super._wrap(ptr);
+
+  Element get control() => _wrap(_ptr.control);
+
+  FormElement get form() => _wrap(_ptr.form);
+
+  String get htmlFor() => _wrap(_ptr.htmlFor);
+
+  void set htmlFor(String value) { _ptr.htmlFor = _unwrap(value); }
+}