Implement invoke, setField, and getField (unminified).

dart/tests/compiler/dart2js_extra/mirrors_test.dart

Index: dart/tests/compiler/dart2js_extra/mirrors_test.dart
diff --git a/dart/tests/language/closure_in_field_initializer_test.dart b/dart/tests/compiler/dart2js_extra/mirrors_test.dart
similarity index 55%
copy from dart/tests/language/closure_in_field_initializer_test.dart
copy to dart/tests/compiler/dart2js_extra/mirrors_test.dart
index bf0198aa4b3ae78e6ad50f19e4e08a573daf80d4..d9df6c57ea8b7e9d50f251cedf92a4337c8605cb 100644
--- a/dart/tests/language/closure_in_field_initializer_test.dart
+++ b/dart/tests/compiler/dart2js_extra/mirrors_test.dart
@@ -2,15 +2,11 @@
 // 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.
 
-import "package:expect/expect.dart";
+// This test should be removed when dart2js can pass all mirror tests.
+// TODO(ahe): Remove this test.
 
-class Foo {
-  var closures = {
-    'a': (x, y) => x + y
-  };
-}
+import '../../lib/mirrors/mirrors_test.dart';
 
 main() {
-  var closures = new Foo().closures;
-  Expect.equals(6, closures['a'](4, 2));
+  mainWithArgument(isDart2js: true);
 }