new TokenType and Keyword API

pkg/front_end/lib/src/scanner/scanner.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:charcode/ascii.dart';
 import 'package:front_end/src/scanner/errors.dart';
 import 'package:front_end/src/scanner/reader.dart';
 import 'package:front_end/src/scanner/string_utilities.dart';
 import 'package:front_end/src/scanner/token.dart';
 
@@ skipping 89 matching lines @@
     }
   }
 
   /**
    * Create and return the initial state in the state machine.
    */
   static KeywordState _createKeywordStateTable() {
     List<Keyword> values = Keyword.values;
     List<String> strings = new List<String>(values.length);
     for (int i = 0; i < values.length; i++) {
-      strings[i] = values[i].syntax;
+      strings[i] = values[i].lexeme;
     }
     strings.sort();
     return _computeKeywordStateTable(0, strings, 0, strings.length);
   }
 }
 
 /**
  * The class `Scanner` implements a scanner for Dart code.
  *
  * The lexical structure of Dart is ambiguous without knowledge of the context
@@ skipping 1215 matching lines @@
   }
 
   /**
    * Checks if [value] is a single-line or multi-line comment.
    */
   static bool _isDocumentationComment(String value) {
     return StringUtilities.startsWith3(value, 0, $slash, $slash, $slash) ||
         StringUtilities.startsWith3(value, 0, $slash, $asterisk, $asterisk);
   }
 }