Support metadata on local variables.

pkg/front_end/lib/src/fasta/parser/parser.dart

 // Copyright (c) 2012, 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.parser.parser;
 
 import '../fasta_codes.dart'
     show
         FastaCode,
         FastaMessage,
@@ skipping 2473 matching lines @@
 
         case AsyncModifier.Async:
           reportRecoverableErrorCode(token, codeYieldNotGenerator);
           return parseYieldStatement(token);
       }
       throw "Internal error: Unknown asyncState: '$asyncState'.";
     } else if (identical(value, 'const')) {
       return parseExpressionStatementOrConstDeclaration(token);
     } else if (token.isIdentifier) {
       return parseExpressionStatementOrDeclaration(token);
+    } else if (identical(value, '@')) {
+      return parseVariablesDeclaration(token);
     } else {
       return parseExpressionStatement(token);
     }
   }
 
   Token parseYieldStatement(Token token) {
     Token begin = token;
     listener.beginYieldStatement(begin);
     assert(identical('yield', token.stringValue));
     token = token.next;
@@ skipping 1520 matching lines @@
     return reportUnrecoverableError(
         token, () => code.format(uri, token.charOffset, string));
   }
 }
 
 typedef FastaMessage NoArgument(Uri uri, int charOffset);
 
 typedef FastaMessage TokenArgument(Uri uri, int charOffset, Token token);
 
 typedef FastaMessage StringArgument(Uri uri, int charOffset, String string);