Parse script tags with Fasta.

pkg/front_end/lib/src/fasta/analyzer/token_utils.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.
 
 library fasta.analyzer.token_utils;
 
 import '../parser/error_kind.dart' show ErrorKind;
 
 import '../scanner/error_token.dart' show ErrorToken;
 
@@ skipping 543 matching lines @@
       var keyword =
           _keywordMap[syntax] ?? internalError('Unknown keyword: $syntax');
       if (commentToken == null) {
         return new analyzer.KeywordToken(keyword, token.charOffset);
       } else {
         return new analyzer.KeywordTokenWithComment(
             keyword, token.charOffset, commentToken);
       }
       break;
 
+    case SCRIPT_TOKEN:
+      return makeStringToken(TokenType.SCRIPT_TAG);
+
     case STRING_TOKEN:
       return makeStringToken(TokenType.STRING);
 
     case OPEN_CURLY_BRACKET_TOKEN:
     case OPEN_SQUARE_BRACKET_TOKEN:
     case OPEN_PAREN_TOKEN:
     case STRING_INTERPOLATION_TOKEN:
       return makeBeginToken(getTokenType(token));
 
     default:
@@ skipping 204 matching lines @@
     case PERIOD_PERIOD_PERIOD_TOKEN:
       return TokenType.PERIOD_PERIOD_PERIOD;
     // case GENERIC_METHOD_TYPE_LIST_TOKEN:
     //   return TokenType.GENERIC_METHOD_TYPE_LIST;
     // case GENERIC_METHOD_TYPE_ASSIGN_TOKEN:
     //   return TokenType.GENERIC_METHOD_TYPE_ASSIGN;
     default:
       return internalError("Unhandled token ${token.info}");
   }
 }