Take inheritance into account when computing the elements accessible by mirrors.

sdk/lib/_internal/compiler/implementation/universe/universe.dart

 // Copyright (c) 2012, 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 universe;
 
 import '../elements/elements.dart';
 import '../dart2jslib.dart';
 import '../dart_types.dart';
 import '../types/types.dart';
@@ skipping 47 matching lines @@
    * in their signature.
    */
   final Set<Element> genericCallMethods = new Set<Element>();
 
   /**
    * Set of closures that use type variables in their signature.
    */
   final Set<Element> genericClosures = new Set<Element>();
 
   /**
+   * Set of all closures in the program. Used by the mirror tracking system
+   * to find all live closure instances.
+   */
+  final Set<FunctionElement> allClosures = new Set<FunctionElement>();
+
+  /**
    * Set of methods in instantiated classes that are potentially
    * closurized.
    */
   final Set<Element> closurizedMembers = new Set<Element>();
 
   bool usingFactoryWithTypeArguments = false;
 
   bool hasMatchingSelector(Set<Selector> selectors,
                            Element member,
                            Compiler compiler) {
@@ skipping 602 matching lines @@
   }
 
   Selector extendIfReachesAll(Compiler compiler) {
     bool canReachAll = compiler.enabledInvokeOn
         && mask.needsNoSuchMethodHandling(this, compiler);
     return canReachAll
         ? new TypedSelector(compiler.typesTask.dynamicType, this, compiler)
         : this;
   }
 }