Handle instantiation of native classes in closed_world2_test

pkg/compiler/lib/src/frontend_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.frontend_strategy;
 
 import 'common.dart';
 import 'common_elements.dart';
 import 'common/tasks.dart';
 import 'elements/entities.dart';
 import 'environment.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';
 
 /// Strategy pattern that defines the connection between the input format and
 /// the resolved element model.
 abstract class FrontEndStrategy {
   /// Creates library loader task for this strategy.
   LibraryLoaderTask createLibraryLoader(
       ResolvedUriTranslator uriTranslator,
       ScriptLoader scriptLoader,
       ElementScanner scriptScanner,
       LibraryDeserializer deserializer,
       PatchResolverFunction patchResolverFunc,
       PatchParserTask patchParser,
       Environment environment,
       DiagnosticReporter reporter,
       Measurer measurer);
 
   /// Returns the [ElementEnvironment] for the element model used in this
   /// strategy.
   ElementEnvironment get elementEnvironment;
 
   /// Returns the [AnnotationProcessor] for this strategy.
   AnnotationProcessor get annotationProcesser;
+
+  /// Creates the [NativeClassFinder] for this strategy.
+  NativeClassFinder createNativeClassResolver(NativeBasicData nativeBasicData);
 }
 
 /// Class that performs the mechanics to investigate annotations in the code.
 abstract class AnnotationProcessor {
   void extractNativeAnnotations(
       LibraryEntity library, NativeBasicDataBuilder nativeBasicDataBuilder);
 
   void extractJsInteropAnnotations(
       LibraryEntity library, NativeBasicDataBuilder nativeBasicDataBuilder);
 }