Fix for issue 1623: bind does not work on safari.

tests/language/BindTest.dart

Index: tests/language/BindTest.dart
===================================================================
--- tests/language/BindTest.dart	(revision 0)
+++ tests/language/BindTest.dart	(revision 0)
@@ -0,0 +1,14 @@
+// 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.
+
+class Bound {
+  run() {
+    return 42;
+  }
+}
+
+void main() {
+  var runner = new Bound().run;
+  Expect.equals(42, runner());
+}