Migrated test lock 217 to Dart 2.0.

tests/lib/mirrors/array_tracing2_test.dart

Index: tests/lib/mirrors/array_tracing2_test.dart
diff --git a/tests/lib/mirrors/array_tracing2_test.dart b/tests/lib/mirrors/array_tracing2_test.dart
deleted file mode 100644
index cd7c9058f4b4d732e77ef177575de056f9f31e8e..0000000000000000000000000000000000000000
--- a/tests/lib/mirrors/array_tracing2_test.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2013, 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.
-
-library lib;
-
-@MirrorsUsed(targets: const ["lib", "dart.core"])
-import 'dart:mirrors';
-
-class A {
-  var field;
-}
-
-main() {
-  var a = new A();
-  var mirror = reflect(a);
-  var array = [42];
-  a.field = array;
-  var field = mirror.getField(#field);
-  field.invoke(#clear, []);
-  if (array.length == 1) throw 'Test failed';
-}