Use entities in CommonElements interface.

pkg/compiler/lib/src/resolution/enum_creator.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 dart2js.resolution.enum_creator;
 
 import '../common.dart';
 import '../core_types.dart' show CommonElements;
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
@@ skipping 264 matching lines @@
 
       EnumConstantElementX field = new EnumConstantElementX(
           name, enumClass, variableList, definition, initializer, index);
       enumValues.add(field);
       enumClass.addMember(field, reporter);
       index++;
     }
 
     VariableList valuesVariableList =
         new VariableList(builder.modifiers(isStatic: true, isConst: true));
-    valuesVariableList.type = commonElements.listType(enumType);
+    ResolutionInterfaceType valuesType = commonElements.listType(enumType);
+    valuesVariableList.type = valuesType;
 
     Identifier valuesIdentifier = builder.identifier('values');
     // TODO(johnniwinther): Add type argument.
     Expression initializer =
         builder.listLiteral(valueReferences, isConst: true);
 
     Node definition = builder.createDefinition(valuesIdentifier, initializer);
 
     EnumFieldElementX valuesVariable = new EnumFieldElementX(valuesIdentifier,
         enumClass, valuesVariableList, definition, initializer);
@@ skipping 14 matching lines @@
     EnumMethodElementX toString = new EnumMethodElementX(
         'toString', enumClass, Modifiers.EMPTY, toStringNode);
     FunctionSignatureX toStringSignature = new FunctionSignatureX(
         type: new ResolutionFunctionType(toString, stringType));
     toString.functionSignature = toStringSignature;
     enumClass.addMember(toString, reporter);
 
     enumClass.enumValues = enumValues;
   }
 }