Fix for parsing EmptyFunctionBody with Fasta.

pkg/front_end/lib/src/fasta/kernel/body_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.body_builder;
 
 import '../parser/parser.dart' show FormalParameterType, optional;
 
 import '../parser/error_kind.dart' show ErrorKind;
 
@@ skipping 840 matching lines @@
     push(new StringConcatenation(expressions ?? parts));
   }
 
   @override
   void handleLiteralInt(Token token) {
     debugEvent("LiteralInt");
     push(new IntLiteral(int.parse(token.value)));
   }
 
   @override
+  void endEmptyFunctionBody(Token semicolon) {
+    debugEvent("ExpressionFunctionBody");
+    endFunctionBody(0, null, semicolon);
+  }
+
+  @override
   void endExpressionFunctionBody(Token arrowToken, Token endToken) {
     debugEvent("ExpressionFunctionBody");
     endReturnStatement(true, arrowToken, endToken);
   }
 
   @override
   void endReturnStatement(
       bool hasExpression, Token beginToken, Token endToken) {
     debugEvent("ReturnStatement");
     Expression expression = hasExpression ? popForValue() : null;
@@ skipping 1850 matching lines @@
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisAccessor) {
     return node.isSuper ? "super" : "this";
   } else if (node is BuilderAccessor) {
     return node.plainNameForRead;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }