Add ElementCodegenWorldBuilder

pkg/compiler/lib/src/js_emitter/program_builder/collector.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.js_emitter.program_builder;
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
  * in classes) are ignored, since they can be treated as non-class elements.
  *
@@ skipping 185 matching lines @@
 
   /// Compute all the classes and typedefs that must be emitted.
   void computeNeededDeclarations() {
     // Compute needed typedefs.
     typedefsNeededForReflection = Elements.sortedByPosition(_closedWorld
         .allTypedefs
         .where(_mirrorsData.isTypedefAccessibleByReflection)
         .toList());
 
     // Compute needed classes.
-    Set<ClassElement> instantiatedClasses =
+    Set<ClassEntity> instantiatedClasses =
         // TODO(johnniwinther): This should be accessed from a codegen closed
         // world.
         _worldBuilder.directlyInstantiatedClasses
             .where(computeClassFilter())
             .toSet();
 
     void addClassWithSuperclasses(ClassElement cls) {
       neededClasses.add(cls);
       for (ClassElement superclass = cls.superclass;
           superclass != null;
           superclass = superclass.superclass) {
         neededClasses.add(superclass);
       }
     }
 
-    void addClassesWithSuperclasses(Iterable<ClassElement> classes) {
+    void addClassesWithSuperclasses(Iterable<ClassEntity> classes) {
       for (ClassElement cls in classes) {
         addClassWithSuperclasses(cls);
       }
     }
 
     // 1. We need to generate all classes that are instantiated.
     addClassesWithSuperclasses(instantiatedClasses);
 
     // 2. Add all classes used as mixins.
     Set<ClassElement> mixinClasses = neededClasses
@@ skipping 122 matching lines @@
   }
 
   void collect() {
     computeNeededDeclarations();
     computeNeededConstants();
     computeNeededStatics();
     computeNeededStaticNonFinalFields();
     computeNeededLibraries();
   }
 }