new TokenType and Keyword API

pkg/front_end/lib/src/fasta/scanner/array_based_scanner.dart

 // Copyright (c) 2011, 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.scanner.array_based_scanner;
 
 import 'error_token.dart' show ErrorToken, UnmatchedToken;
 
 import '../../scanner/token.dart' show Keyword, TokenType;
 
@@ skipping 57 matching lines @@
     } else {
       appendPrecedenceToken(no);
       return next;
     }
   }
 
   /**
    * Appends a keyword token whose kind is determined by [keyword].
    */
   void appendKeywordToken(Keyword keyword) {
-    String syntax = keyword.syntax;
+    String syntax = keyword.lexeme;
     // Type parameters and arguments cannot contain 'this'.
     if (identical(syntax, 'this')) {
       discardOpenLt();
     }
     appendToken(new KeywordToken(keyword, tokenStart));
   }
 
   void appendEofToken() {
     beginToken();
     discardOpenLt();
@@ skipping 208 matching lines @@
     //      |
     //     next
     //      v
     //     EOF
     TokenType info = closeBraceInfoFor(begin);
     appendToken(new SyntheticSymbolToken(info, tokenStart));
     begin.endGroup = tail;
     appendErrorToken(new UnmatchedToken(begin));
   }
 }