Start separating ClassElementImpl for Class and Enum.

pkg/analyzer/test/generated/resolver_test_case.dart

 // Copyright (c) 2016, 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.test.generated.resolver_test_case;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 528 matching lines @@
     FileBasedSource definingCompilationUnitSource = createNamedSource(fileName);
     List<CompilationUnitElement> sourcedCompilationUnits;
     if (typeNames == null) {
       sourcedCompilationUnits = CompilationUnitElement.EMPTY_LIST;
     } else {
       int count = typeNames.length;
       sourcedCompilationUnits = new List<CompilationUnitElement>(count);
       for (int i = 0; i < count; i++) {
         String typeName = typeNames[i];
         ClassElementImpl type =
-            new ClassElementImpl.forNode(AstFactory.identifier3(typeName));
+            new ClassElementImpl_Class.forNode(AstFactory.identifier3(typeName));
         String fileName = "$typeName.dart";
         CompilationUnitElementImpl compilationUnit =
             new CompilationUnitElementImpl(fileName);
         compilationUnit.source = createNamedSource(fileName);
         compilationUnit.librarySource = definingCompilationUnitSource;
         compilationUnit.types = <ClassElement>[type];
         sourcedCompilationUnits[i] = compilationUnit;
       }
     }
     CompilationUnitElementImpl compilationUnit =
@@ skipping 277 matching lines @@
    * text. Otherwise, [expected] is used directly a [Matcher] to match the type.
    */
   _expectType(DartType type, expected) {
     if (expected is String) {
       expect(type.toString(), expected);
     } else {
       expect(type, expected);
     }
   }
 }