Prepare to have more than one universe.

dart/lib/compiler/implementation/resolver.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.
 
 interface TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   Type getType(TypeAnnotation annotation);
 }
 
@@ skipping 1715 matching lines @@
       element = visitSend(node);
     } else if (node.selector.asIdentifier() != null) {
       Element variables = new VariableListElement.node(currentDefinitions,
           ElementKind.VARIABLE_LIST, enclosingElement);
       element = new VariableElement(node.selector.asIdentifier().source,
           variables, ElementKind.PARAMETER, enclosingElement, node: node);
     }
     // Visit the value. The compile time constant handler will
     // make sure it's a compile time constant.
     resolveExpression(node.arguments.head);
-    // TODO(ahe): Do not call addToWorkList, and make sure that element isn't null.
-    if (element !== null) compiler.addToWorkList(element);
+    // TODO(ahe): Move this to codegen, and make sure that element isn't null.
+    if (element !== null) compiler.enqueuer.codegen.addToWorkList(element);
     return element;
   }
 
   Element visitFunctionExpression(FunctionExpression node) {
     // This is a function typed parameter.
     // TODO(ahe): Resolve the function type.
     return visit(node.name);
   }
 
   LinkBuilder<Element> analyzeNodes(Link<Node> link) {
@@ skipping 195 matching lines @@
 
   TopScope(LibraryElement library) : super(null, library);
   Element lookup(SourceString name) {
     return library.find(name);
   }
 
   Element add(Element newElement) {
     throw "Cannot add an element in the top scope";
   }
 }