Handle instantiation of native classes in closed_world2_test

pkg/compiler/lib/src/kernel/kernel_strategy.dart

 // Copyright (c) 2017, 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.kernel.frontend_strategy;
 
 import '../common.dart';
 import '../common_elements.dart';
 import '../common/tasks.dart';
 import '../environment.dart' as env;
 import '../frontend_strategy.dart';
+import '../js_backend/native_data.dart';
 import '../library_loader.dart';
+import '../native/resolver.dart';
 import '../serialization/task.dart';
 import '../patch_parser.dart';
 import '../resolved_uri_translator.dart';
 import 'element_map.dart';
 
 /// Front end strategy that loads '.dill' files and builds a resolved element
 /// model from kernel IR nodes.
 class KernelFrontEndStrategy implements FrontEndStrategy {
   KernelToElementMap elementMap;
 
@@ skipping 16 matching lines @@
     return new DillLibraryLoaderTask(
         elementMap, uriTranslator, scriptLoader, reporter, measurer);
   }
 
   @override
   ElementEnvironment get elementEnvironment => elementMap.elementEnvironment;
 
   @override
   AnnotationProcessor get annotationProcesser =>
       _annotationProcesser ??= new KernelAnnotationProcessor(elementMap);
+
+  @override
+  NativeClassFinder createNativeClassResolver(NativeBasicData nativeBasicData) {
+    return new BaseNativeClassFinder(elementMap.elementEnvironment,
+        elementMap.commonElements, nativeBasicData);
+  }
 }