Rename Enqueuer.universe to worldBuilder.

tests/compiler/dart2js/instantiated_classes_test.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 instantiated_classes_test;
 
 import 'dart:async';
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/elements/elements.dart' show ClassElement;
@@ skipping 75 matching lines @@
   for (String newClass in newClasses) {
     mainSource.write('  new $newClass();\n');
   }
   mainSource.write('}');
   return TypeEnvironment
       .create(source, mainSource: mainSource.toString(), useMockCompiler: true)
       .then((env) {
     Iterable<ClassElement> expectedClasses =
         directlyInstantiatedClasses.map(env.getElement);
     Iterable<ClassElement> actualClasses = env
-        .compiler.resolverWorld.directlyInstantiatedClasses
+        .compiler.resolutionWorldBuilder.directlyInstantiatedClasses
         .where((c) => c.library == env.compiler.mainApp);
     Expect.setEquals(expectedClasses, actualClasses);
   });
 }