Patch refactoring.

lib/compiler/implementation/world.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.
 
 class World {
   final Compiler compiler;
   final Map<ClassElement, Set<ClassElement>> subtypes;
   final Set<ClassElement> classesNeedingRti;
   final Map<ClassElement, Set<ClassElement>> rtiDependencies;
   final FunctionSet userDefinedGetters;
@@ skipping 94 matching lines @@
    * Returns a [MemberSet] that contains the possible targets of the given
    * [selector] on a receiver with the given [type]. This includes all sub
    * types.
    */
   MemberSet _memberSetFor(DartType type, Selector selector) {
     assert(compiler !== null);
     ClassElement cls = type.element;
     SourceString name = selector.name;
     LibraryElement library = selector.library;
     MemberSet result = new MemberSet(name);
-    Element element = cls.lookupSelector(selector);
+    Element element = cls.implementation.lookupSelector(selector);
     if (element !== null) result.add(element);
 
     bool isPrivate = name.isPrivate();
     Set<ClassElement> subtypesOfCls = subtypes[cls];
     if (subtypesOfCls !== null) {
       for (ClassElement sub in subtypesOfCls) {
         // Private members from a different library are not visible.
         if (isPrivate && sub.getLibrary() != library) continue;
-        element = sub.lookupLocalMember(name);
+        element = sub.implementation.lookupLocalMember(name);
         if (element !== null) result.add(element);
       }
     }
     return result;
   }
 
   /**
    * Returns the field in [type] described by the given [selector].
    * If no such field exists, or a subclass overrides the field
    * returns [:null:].
    */
   VariableElement locateSingleField(DartType type, Selector selector) {
     MemberSet memberSet = _memberSetFor(type, selector);
     ClassElement cls = type.element;
-    Element result = cls.lookupSelector(selector);
+    Element result = cls.implementation.lookupSelector(selector);
     if (result == null) return null;
     if (!result.isField()) return null;
 
     // Verify that no subclass overrides the field.
     if (memberSet.elements.length != 1) return null;
     assert(memberSet.elements.contains(result));
     return result;
   }
 
   Set<ClassElement> findNoSuchMethodHolders(DartType type) {
@@ skipping 19 matching lines @@
   final SourceString name;
 
   MemberSet(SourceString this.name) : elements = new Set<Element>();
 
   void add(Element element) {
     elements.add(element);
   }
 
   bool isEmpty() => elements.isEmpty();
 }