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

client/html/src/_Testing.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// TODO(rnystrom): add a way to supress public classes from DartDoc output.
+/**
+ * This class is intended for testing purposes only.
+ */
+class Testing {
+  static void addEventListener(EventTarget target, String type, EventListener listener, bool useCapture) {
+    target._addEventListener(type, listener, useCapture);
+  }
+  static void removeEventListener(EventTarget target, String type, EventListener listener, bool useCapture) {
+    target._removeEventListener(type, listener, useCapture);
+  }
+
+}