Use the entity model for dump_info.

pkg/compiler/lib/src/serialization/modelz.dart

 // Copyright (c) 2015, 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.
 
 /// Implementation of the element model used for deserialiation.
 ///
 /// These classes are created by [ElementDeserializer] triggered by the
 /// [Deserializer].
 
 library dart2js.serialization.modelz;
@@ skipping 1536 matching lines @@
   @override
   MemberElement get memberContext => this;
 
   @override
   Name get memberName => definingConstructor.memberName;
 
   @override
   String get name => definingConstructor.name;
 
   @override
-  List<FunctionElement> get nestedClosures => const <FunctionElement>[];
+  List<MethodElement> get nestedClosures => const <MethodElement>[];
 
   @override
   List<ParameterElement> get parameters {
     // TODO(johnniwinther): We need to create synthetic parameters that
     // substitute type variables.
     return definingConstructor.parameters;
   }
 
   // TODO: implement redirectionDeferredPrefix
   @override
@@ skipping 11 matching lines @@
     // variables correctly.
     return definingConstructor.type;
   }
 
   @override
   List<ResolutionDartType> get typeVariables => _unsupported("typeVariables");
 }
 
 abstract class MemberElementMixin
     implements DeserializedElementZ, MemberElement {
-  final List<FunctionElement> nestedClosures = <FunctionElement>[];
+  final List<MethodElement> nestedClosures = <MethodElement>[];
 
   @override
   MemberElement get memberContext => this;
 
   @override
   Name get memberName => new Name(name, library);
 
   @override
   bool get isInjected => _decoder.getBool(Key.IS_INJECTED);
 }
@@ skipping 858 matching lines @@
   }
 
   @override
   Node get node => throw new UnsupportedError('${this}.node');
 
   @override
   bool get hasNode => false;
 
   String toString() => 'MetadataAnnotationZ(${constant.toDartText()})';
 }