Preliminary checked mirrors (not ready for review yet)

pkg/checked_mirrors/test/from_sdk/array_tracing_test.dart

Index: pkg/checked_mirrors/test/from_sdk/array_tracing_test.dart
diff --git a/tests/lib/mirrors/array_tracing_test.dart b/pkg/checked_mirrors/test/from_sdk/array_tracing_test.dart
similarity index 89%
copy from tests/lib/mirrors/array_tracing_test.dart
copy to pkg/checked_mirrors/test/from_sdk/array_tracing_test.dart
index 092feacdc82c32d01118abc285f213946fa626c3..2e0e1ca4ee6fe39623dd7e363ccdea1a4c3f7299 100644
--- a/tests/lib/mirrors/array_tracing_test.dart
+++ b/pkg/checked_mirrors/test/from_sdk/array_tracing_test.dart
@@ -2,7 +2,7 @@
 // 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 'dart:mirrors';
+import 'package:checked_mirrors/checked_mirrors.dart';
 
 class A {
   static var field;