add support for native methods in class

pkg/analyzer/tool/summary/mini_ast.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.
 
 import 'package:front_end/src/fasta/problems.dart'
     show internalProblem, unsupported;
 import 'package:front_end/src/fasta/messages.dart' show Message;
 import 'package:front_end/src/fasta/parser.dart';
 import 'package:front_end/src/fasta/source/stack_listener.dart';
 import 'package:front_end/src/scanner/token.dart';
@@ skipping 314 matching lines @@
     String name = pop();
     push(new Annotation(name, constructorName, arguments));
   }
 
   @override
   void endMetadataStar(int count, bool forParameter) {
     debugEvent("MetadataStar");
     push(popList(count) ?? NullValue.Metadata);
   }
 
-  void endMethod(Token getOrSet, Token beginToken, Token endToken) {
+  void endMethod(
+      Token getOrSet, Token beginToken, Token nativeToken, Token endToken) {
     debugEvent("Method");
     pop(); // Body
     pop(); // Initializers
     pop(); // Formal parameters
     pop(); // Type variables
     String name = pop();
     TypeName returnType = pop();
     List<Annotation> metadata = pop();
     Comment comment = pop();
     push(new MethodDeclaration(
@@ skipping 138 matching lines @@
   final String name;
 
   final List<TypeName> typeArguments;
 
   TypeName(this.name, this.typeArguments);
 }
 
 /// "Mini AST" representation of an expression which summary code generation
 /// need not be concerned about.
 class UnknownExpression extends Expression {}