Added ClosureMirror to dart:mirrors. Added Dart_ClosureFunction to the

tests/lib/mirrors/mirrors_test.dart

 // Copyright (c) 2011, 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(rmacnak): Move the existing mirror tests here (a place for 
 // cross-implementation tests).
 
 #library("MirrorsTest.dart");
 #import("dart:mirrors");
 #import("../../../lib/unittest/unittest.dart");
@@ skipping 27 matching lines @@
   }));
 
   instMirror.setField('field', 44);
   future = instMirror.getField('field');
   future.then(expectAsync1((resultMirror) {
     expect(resultMirror.reflectee, equals(44));
     expect(instance.field, equals(44)); 
   }));
 }
 
+testClosureMirrors(mirrors) {
+  var closure = (x, y, z) { return x + y + z; };
+  
+  var mirror = mirrors.mirrorOf(closure);
+  expect(mirror is ClosureMirror, equals(true));
+  
+  var funcMirror = mirror.function();
+  expect(funcMirror is MethodMirror, equals(true));
+  expect(funcMirror.parameters().length, equals(3));
+
+  var future = mirror.apply([2, 4, 8]);
+  future.then(expectAsync1((resultMirror) {
+    expect(resultMirror.reflectee, equals(14));
+  }));
+}
+
 main() {
   var mirrors = currentMirrorSystem();
 
   test("Test field access", () { testFieldAccess(mirrors); });
+  test("Test closure mirrors", () { testClosureMirrors(mirrors); });
 }