Censor dart:_blink and dart:builtin from the enumeration of libraries in the isolate and from impor…

tests/lib/mirrors/mirrors_reader_test.dart

 // 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.
 
 // Test that everything reachable from a [MirrorSystem] can be accessed.
 
 library test.mirrors.reader;
 
 import 'dart:mirrors';
+import 'package:expect/expect.dart';
 import 'mirrors_reader.dart';
 
 class RuntimeMirrorsReader extends MirrorsReader {
+  final MirrorSystem mirrorSystem;
   final String mirrorSystemType;
 
   RuntimeMirrorsReader(MirrorSystem mirrorSystem,
                       {bool verbose: false, bool includeStackTrace: false})
-      : this.mirrorSystemType = '${mirrorSystem.runtimeType}',
+      : this.mirrorSystem = mirrorSystem,
+        this.mirrorSystemType = '${mirrorSystem.runtimeType}',
         super(verbose: verbose, includeStackTrace: includeStackTrace);
 
+  visitLibraryMirror(LibraryMirror mirror) {
+    super.visitLibraryMirror(mirror);
+    Expect.equals(mirror, mirrorSystem.libraries[mirror.uri]);
+  }
+
+  visitClassMirror(ClassMirror mirror) {
+    super.visitClassMirror(mirror);
+    Expect.isNotNull(mirror.owner);
+  }
+
   bool allowUnsupported(var receiver, String tag, UnsupportedError exception) {
     if (mirrorSystemType == '_LocalMirrorSystem') {
       // VM mirror system.
     } else if (mirrorSystemType == 'JsMirrorSystem') {
       // Dart2js runtime mirror system.
       if (tag.endsWith('.metadata')) {
         return true;// Issue 10905.
       }
     }
     return false;
@@ skipping 18 matching lines @@
   }
 }
 
 void main([List<String> arguments = const <String>[]]) {
   MirrorSystem mirrors = currentMirrorSystem();
   MirrorsReader reader = new RuntimeMirrorsReader(mirrors,
       verbose: arguments.contains('-v'),
       includeStackTrace: arguments.contains('-s'));
   reader.checkMirrorSystem(mirrors);
 }