translate missing ">" fasta error code to analyzer error

pkg/front_end/lib/src/scanner/errors.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.
 
 import 'package:front_end/src/base/errors.dart';
 import 'package:front_end/src/fasta/fasta_codes.dart';
 import 'package:front_end/src/fasta/scanner/error_token.dart';
 import 'package:front_end/src/scanner/token.dart' show Token, TokenType;
 import 'package:front_end/src/fasta/scanner/token_constants.dart';
 
@@ skipping 123 matching lines @@
         if (type == TokenType.OPEN_CURLY_BRACKET ||
             type == TokenType.STRING_INTERPOLATION_EXPRESSION) {
           return _makeError(ScannerErrorCode.EXPECTED_TOKEN, ['}']);
         }
         if (type == TokenType.OPEN_SQUARE_BRACKET) {
           return _makeError(ScannerErrorCode.EXPECTED_TOKEN, [']']);
         }
         if (type == TokenType.OPEN_PAREN) {
           return _makeError(ScannerErrorCode.EXPECTED_TOKEN, [')']);
         }
+        if (type == TokenType.LT) {
+          return _makeError(ScannerErrorCode.EXPECTED_TOKEN, ['>']);
+        }
       } else if (errorCode == codeUnexpectedDollarInString) {
         return _makeError(ScannerErrorCode.MISSING_IDENTIFIER, null);
       }
       throw new UnimplementedError('$errorCode');
   }
 }
 
 /**
  * Determines whether the given [charOffset], which came from the non-EOF token
  * [token], represents the end of the input.
  */
 bool _isAtEnd(Token token, int charOffset) {
   while (true) {
     // Skip to the next token.
     token = token.next;
     // If we've found an EOF token, its charOffset indicates where the end of
     // the input is.
     if (token.isEof) return token.charOffset == charOffset;
     // If we've found a non-error token, then we know there is additional input
     // text after [charOffset].
     if (token.type.kind != BAD_INPUT_TOKEN) return false;
     // Otherwise keep looking.
   }
 }