Expose default constructors through ClassElement.localMembers.

dart/sdk/lib/_internal/compiler/implementation/elements/modelx.dart

 // Copyright (c) 2013, 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 elements.modelx;
 
 import 'dart:collection' show LinkedHashMap;
 
 import 'elements.dart';
 import '../../compiler.dart' as api;
@@ skipping 1941 matching lines @@
   bool get hasConstructor {
     // Search in scope to be sure we search patched constructors.
     for (var element in localScope.values) {
       if (element.isConstructor()) return true;
     }
     return false;
   }
 
   void setDefaultConstructor(FunctionElement constructor, Compiler compiler) {
     addToScope(constructor, compiler);
+    // The default constructor, although synthetic, is part of a class' API.
+    localMembers = localMembers.prepend(constructor);
   }
 
   Link<DartType> computeTypeParameters(Compiler compiler) {
     ClassNode node = parseNode(compiler);
     return TypeDeclarationElementX.createTypeVariables(
         this, node.typeParameters);
   }
 
   Scope buildScope() => new ClassScope(enclosingElement.buildScope(), this);
 
@@ skipping 214 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }