Alternative fix for the js-interop crash.

tests/html/js_typed_interop_anonymous_exp_test.dart

Index: tests/html/js_typed_interop_anonymous_exp_test.dart
diff --git a/tests/html/js_typed_interop_anonymous_exp_test.dart b/tests/html/js_typed_interop_anonymous_exp_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..40a04aa8b4ebd3fff48571c8f80225c4c23839e0
--- /dev/null
+++ b/tests/html/js_typed_interop_anonymous_exp_test.dart
@@ -0,0 +1,36 @@
+// Copyright (c) 2015, 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.
+//
+// SharedOptions=--experimental-trust-js-interop-type-annotations
+
+// Same test as js_typed_interop_anonymous, but using the
+// --experimental-trust-js-interop-type-annotations flag.
+library js_typed_interop_anonymous_exp_test;
+
+import 'dart:html';
+import 'dart:js' as js;
+
+import 'package:js/js.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+@JS() @anonymous
+class Literal {
+  external factory Literal({int x, String y, num z});
+
+  external int get x;
+  external String get y;
+  external num get z;
+}
+
+main() {
+  useHtmlConfiguration();
+
+  test('simple', () {
+    var l = new Literal(x: 3, y: "foo");
+    expect(l.x, equals(3));
+    expect(l.y, equals("foo"));
+    expect(l.z, isNull);
+  });
+}