Add ElementCodegenWorldBuilder

pkg/compiler/lib/src/native/enqueue.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.
 
 import '../common_elements.dart' show CommonElements, ElementEnvironment;
 import '../elements/elements.dart';
 import '../elements/entities.dart';
 import '../elements/resolution_types.dart';
 import '../elements/types.dart';
 import '../js_backend/backend_usage.dart' show BackendUsageBuilder;
@@ skipping 228 matching lines @@
   NativeCodegenEnqueuer(
       CompilerOptions options,
       ElementEnvironment elementEnvironment,
       CommonElements commonElements,
       DartTypes dartTypes,
       this._emitter,
       this._resolutionEnqueuer,
       this._nativeData)
       : super(options, elementEnvironment, commonElements, dartTypes);
 
-  WorldImpact processNativeClasses(Iterable<LibraryElement> libraries) {
+  WorldImpact processNativeClasses(Iterable<LibraryEntity> libraries) {
     WorldImpactBuilderImpl impactBuilder = new WorldImpactBuilderImpl();
     _unusedClasses.addAll(_resolutionEnqueuer._nativeClasses);
 
     if (!enableLiveTypeAnalysis) {
       _registerTypeUses(
           impactBuilder, _resolutionEnqueuer._nativeClasses, 'forced');
     }
 
     // HACK HACK - add all the resolved classes.
     Set<ClassEntity> matchingClasses = new Set<ClassEntity>();
@@ skipping 48 matching lines @@
         emitter.directSubtypes.putIfAbsent(superclass, () => <ClassEntity>[]);
     directSubtypes.add(cls);
   }
 
   void logSummary(void log(String message)) {
     super.logSummary(log);
     log('Compiled ${_registeredClasses.length} native classes, '
         '${_unusedClasses.length} native classes omitted.');
   }
 }