Reapply "Access to imports in the VM's runtime mirrors. Extend test coverage of the source mirrors."

tests/compiler/dart2js/mirrors/library_imports_prefixed_show_hide_test.dart

Index: tests/compiler/dart2js/mirrors/library_imports_prefixed_show_hide_test.dart
diff --git a/tests/compiler/dart2js/mirrors/relation_subclass_test.dart b/tests/compiler/dart2js/mirrors/library_imports_prefixed_show_hide_test.dart
similarity index 59%
copy from tests/compiler/dart2js/mirrors/relation_subclass_test.dart
copy to tests/compiler/dart2js/mirrors/library_imports_prefixed_show_hide_test.dart
index eaab60827f5179cdd4286459cf75abeccb66c3c8..910dde5d3de6b188381058ed15c1235d1682ba0c 100644
--- a/tests/compiler/dart2js/mirrors/relation_subclass_test.dart
+++ b/tests/compiler/dart2js/mirrors/library_imports_prefixed_show_hide_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2014, 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.
 
@@ -7,10 +7,10 @@ import "dart:mirrors";
 import "package:async_helper/async_helper.dart";
 
 import "mirrors_test_helper.dart";
-import "../../../lib/mirrors/relation_subclass_test.dart";
+import "../../../lib/mirrors/library_imports_prefixed_show_hide_test.dart";
 
 main() {
-  asyncTest(() => analyze("relation_subclass_test.dart").
+  asyncTest(() => analyze("library_imports_prefixed_show_hide_test.dart").
       then((MirrorSystem mirrors) {
     test(mirrors);
   }));