Rename Enqueuer.universe to worldBuilder.

pkg/compiler/lib/src/js_backend/enqueuer.dart

 // Copyright (c) 2012, 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.js.enqueue;
 
 import 'dart:collection' show Queue;
 
 import '../cache_strategy.dart' show CacheStrategy;
 import '../common/backend_api.dart' show Backend;
@@ skipping 54 matching lines @@
         _workItemBuilder = new CodegenWorkItemBuilder(backend, options),
         newlyEnqueuedElements = cacheStrategy.newSet(),
         newlySeenSelectors = cacheStrategy.newSet(),
         nativeEnqueuer = backend.nativeCodegenEnqueuer(),
         this._backend = backend,
         this._options = options,
         this.name = 'codegen enqueuer' {
     _impactVisitor = new EnqueuerImplImpactVisitor(this);
   }
 
-  CodegenWorldBuilder get universe => _universe;
+  CodegenWorldBuilder get worldBuilder => _universe;
 
   bool get queueIsEmpty => _queue.isEmpty;
 
   /// Returns [:true:] if this enqueuer is the resolution enqueuer.
   bool get isResolutionQueue => false;
 
   /// Create a [WorkItem] for [entity] and add it to the work list if it has not
   /// already been processed.
   void _addToWorkList(MemberEntity entity) {
     if (_processedEntities.contains(entity)) return;
@@ skipping 209 matching lines @@
     // code for checked setters.
     if (element.isField && element.isInstanceMember) {
       if (!_options.enableTypeAssertions ||
           element.enclosingElement.isClosure) {
         return null;
       }
     }
     return new CodegenWorkItem(_backend, element);
   }
 }