Delay 'supertype' for ClassElementImpl and EnumElementImpl.

pkg/analyzer/lib/src/generated/testing/element_factory.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.
 
 library analyzer.src.generated.testing.element_factory;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 128 matching lines @@
 
   static EnumElementImpl enumElement(
       TypeProvider typeProvider, String enumName,
       [List<String> constantNames]) {
     //
     // Build the enum.
     //
     EnumElementImpl enumElement = new EnumElementImpl(enumName, -1);
     InterfaceTypeImpl enumType = new InterfaceTypeImpl(enumElement);
     enumElement.type = enumType;
-    enumElement.supertype = objectType;
     //
     // Populate the fields.
     //
     List<FieldElement> fields = new List<FieldElement>();
     InterfaceType intType = typeProvider.intType;
     InterfaceType stringType = typeProvider.stringType;
     String indexFieldName = "index";
     FieldElementImpl indexField = new FieldElementImpl(indexFieldName, -1);
     indexField.final2 = true;
     indexField.type = intType;
@@ skipping 462 matching lines @@
   }
 
   static TypeParameterElementImpl typeParameterWithType(String name,
       [DartType bound]) {
     TypeParameterElementImpl typeParameter = typeParameterElement(name);
     typeParameter.type = new TypeParameterTypeImpl(typeParameter);
     typeParameter.bound = bound;
     return typeParameter;
   }
 }