Handle js interop members in impact computation.

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 '../../compiler_new.dart' as api;
 import '../common.dart';
 import '../common_elements.dart';
 import '../common/backend_api.dart';
@@ skipping 34 matching lines @@
   CompilerOptions _options;
   KernelToElementMapForImpactImpl _elementMap;
 
   KernelAnnotationProcessor _annotationProcesser;
 
   final Map<MemberEntity, ClosureModel> closureModels =
       <MemberEntity, ClosureModel>{};
 
   KernelFrontEndStrategy(
       this._options, DiagnosticReporter reporter, env.Environment environment) {
-    _elementMap =
-        new KernelToElementMapForImpactImpl(reporter, environment, this);
+    _elementMap = new KernelToElementMapForImpactImpl(
+        reporter, environment, this, _options);
   }
 
   @override
   LibraryLoaderTask createLibraryLoader(
       ResolvedUriTranslator uriTranslator,
       ScriptLoader scriptLoader,
       api.CompilerInput compilerInput,
       ElementScanner scriptScanner,
       LibraryDeserializer deserializer,
       PatchResolverFunction patchResolverFunc,
@@ skipping 176 matching lines @@
   int get preMirrorsMethodCount {
     // TODO(redemption): Implement this.
     return null;
   }
 
   @override
   void onQueueEmpty(Enqueuer enqueuer, Iterable<ClassEntity> recentClasses) {
     // TODO(redemption): Implement this.
   }
 }