Add an argument to handleFunctionBodySkipped.

pkg/front_end/lib/src/fasta/source/outline_builder.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.outline_builder;
 
 import 'package:kernel/ast.dart' show AsyncMarker, ProcedureKind;
 
 import '../parser/parser.dart' show FormalParameterType, optional;
 
@@ skipping 256 matching lines @@
     nativeMethodName = null;
   }
 
   @override
   void handleNoFunctionBody(Token token) {
     debugEvent("NoFunctionBody");
     push(MethodBody.Abstract);
   }
 
   @override
-  void handleFunctionBodySkipped(Token token) {
+  void handleFunctionBodySkipped(Token token, bool isExpressionBody) {
     debugEvent("handleFunctionBodySkipped");
     push(MethodBody.Regular);
   }
 
   @override
   void beginMethod(Token token, Token name) {
     library.beginNestedDeclaration(name.value, hasMembers: false);
   }
 
   @override
@@ skipping 411 matching lines @@
   Link<Token> handleMemberName(Link<Token> identifiers) {
     if (!isDartLibrary || identifiers.isEmpty) return identifiers;
     return removeNativeClause(identifiers);
   }
 
   @override
   void debugEvent(String name) {
     // printEvent(name);
   }
 }