Update listener error handling.

pkg/fasta/lib/src/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 'package:dart_parser/src/parser.dart' show
     FormalParameterType,
     optional;
 
@@ skipping 2139 matching lines @@
       reportErrorToken(token);
       do {
         token = token.next;
       } while (token is ErrorToken);
       return token;
     }
     const List<String> trailing = const <String>[")", "}", ";", ","];
     if (trailing.contains(token.stringValue) && trailing.contains(string)) {
       // We're just trying to get out an error.
       if (recoverableErrors.isNotEmpty) {
-        reportError(token, ErrorKind.UNSPECIFIED,
+        reportError(token, ErrorKind.Unspecified,
             {"text": "Expected: '$string', but got '${token.value}'"});
       }
       return token;
     }
     return super.expected(string, token);
   }
 
   void warning(error, [int charOffset = -1]) {
     String message = new InputError(uri, charOffset, error).format();
     print(message);
@@ skipping 473 matching lines @@
   } else if (node is TypeDeclarationBuilder) {
     return node.name;
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisPropertyAccessor) {
     return node.name.name;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }