Support metadata on local variables.

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

Index: pkg/front_end/lib/src/fasta/parser/parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/parser.dart b/pkg/front_end/lib/src/fasta/parser/parser.dart
index 5ac645576724d077fea9a372776fc326cb3c3042..42c8f456f4cbb2b5f8d090e106360e994ac9c1cf 100644
--- a/pkg/front_end/lib/src/fasta/parser/parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser/parser.dart
@@ -2491,6 +2491,8 @@ class Parser {
       return parseExpressionStatementOrConstDeclaration(token);
     } else if (token.isIdentifier) {
       return parseExpressionStatementOrDeclaration(token);
+    } else if (identical(value, '@')) {
+      return parseVariablesDeclaration(token);
     } else {
       return parseExpressionStatement(token);
     }