fasta.BeginGroupToken implement analyzer.BeginToken

pkg/front_end/test/precedence_info_test.dart

 // Copyright (c) 2017, 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/fasta/scanner/precedence.dart';
 import 'package:front_end/src/fasta/scanner/string_scanner.dart';
 import 'package:front_end/src/fasta/scanner/token.dart' as fasta;
 import 'package:front_end/src/scanner/token.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 439 matching lines @@
       5: const <String>['||'],
       4: const <String>['??'],
       3: const <String>['? :'],
       2: const <String>['..'],
       1: const <String>['=', '*=', '/=', '+=', '-=', '&=', '^='],
     };
     precedenceTable.forEach((precedence, lexemes) {
       for (String source in lexemes) {
         var scanner = new StringScanner(source, includeComments: true);
         var token = scanner.tokenize();
-        expect(token.type.precedence, precedence, reason: source);
+        expect(token.info.precedence, precedence, reason: source);
       }
     });
   }
 
   void test_identity() {
     var exceptions = <TokenType>[
       // Null lexeme - no corresponding PrecedenceInfo
       TokenType.MULTI_LINE_COMMENT,
       TokenType.SINGLE_LINE_COMMENT,
       TokenType.GENERIC_METHOD_TYPE_LIST,
@@ skipping 34 matching lines @@
     assertLexeme('var', TokenType.KEYWORD);
     assertLexeme('#!/', TokenType.SCRIPT_TAG);
     assertLexeme('"foo"', TokenType.STRING);
 
     expect(STRING_INTERPOLATION_INFO,
         same(TokenType.STRING_INTERPOLATION_EXPRESSION));
     expect(STRING_INTERPOLATION_IDENTIFIER_INFO,
         same(TokenType.STRING_INTERPOLATION_IDENTIFIER));
   }
 }