add support for native methods in class

pkg/front_end/lib/src/fasta/source/diet_listener.dart

 // Copyright (c) 2016, 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 fasta.diet_listener;
 
 import 'package:kernel/ast.dart'
     show AsyncMarker, Class, InterfaceType, Typedef;
 import 'package:kernel/ast.dart';
 
@@ skipping 390 matching lines @@
         MemberKind.Factory, metadata);
   }
 
   @override
   void endRedirectingFactoryBody(Token beginToken, Token endToken) {
     debugEvent("RedirectingFactoryBody");
     discard(1); // ConstructorReference.
   }
 
   @override
-  void endMethod(Token getOrSet, Token beginToken, Token endToken) {
+  void endMethod(
+      Token getOrSet, Token beginToken, Token nativeToken, Token endToken) {
     debugEvent("Method");
     Token bodyToken = pop();
     String name = pop();
     Token metadata = pop();
     checkEmpty(beginToken.charOffset);
     if (bodyToken == null) {
       // TODO(ahe): Don't skip this. We need to compile metadata.
       return;
     }
     ProcedureBuilder builder = lookupBuilder(beginToken, getOrSet, name);
@@ skipping 250 matching lines @@
       void addAnnotation(Expression annotation)) {
     if (metadata != null) {
       var listener = createListener(builder, memberScope, false);
       var parser = new Parser(listener);
       parser.parseMetadataStar(metadata);
       List<Expression> metadataConstants = listener.finishMetadata();
       metadataConstants.forEach(addAnnotation);
     }
   }
 }