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

client/html/generated/html/dartium/DOMFormData.dart

+
+class _DOMFormDataImpl extends _DOMTypeBase implements DOMFormData {
+  _DOMFormDataImpl._wrap(ptr) : super._wrap(ptr);
+
+  void append(String name, String value, String filename) {
+    _ptr.append(_unwrap(name), _unwrap(value), _unwrap(filename));
+    return;
+  }
+}