Remove unused fields in analyzer.

pkg/analyzer/test/services/test_utils.dart

 // Copyright (c) 2013, 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 test_utils;
 
 import 'package:unittest/unittest.dart';
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/parser.dart';
 
 
 /// Instances of the class [_GatheringErrorListener] implement an error listener
 /// that collects all of the errors passed to it for later examination.
 class _GatheringErrorListener implements AnalysisErrorListener {
-
-  /// The source being parsed.
-  String _rawSource;
-
-  /// The source being parsed after inserting a marker at the beginning and end
-  /// of the range of the most recent error.
-  String _markedSource;
-
   /// A list containing the errors that were collected.
   final List<AnalysisError> _errors = new List<AnalysisError>();
 
   /// A table mapping sources to the line information for the source.
   final Map<Source, LineInfo> _lineInfoMap = new Map<Source, LineInfo>();
 
   void onError(AnalysisError error) {
-    if (_rawSource != null) {
-      var left = error.offset;
-      var right = left + error.length - 1;
-      _markedSource = '${_rawSource.substring(0, left)}^${_rawSource.substring(left, right)}^${_rawSource.substring(right)}';
-    }
     _errors.add(error);
   }
 
 
   /// Sets the line information associated with the given source to the given
   /// information.
   void setLineInfo(Source source, List<int> lineStarts) {
     _lineInfoMap[source] = new LineInfo(lineStarts);
   }
 
@@ skipping 158 matching lines @@
   var parser = new Parser(null, listener);
   var statement = parser.parseStatement(token);
   expect(statement, isNotNull);
 
   if (expectedErrorCodes != null) {
     listener.expectErrors(expectedErrorCodes);
   }
 
   return statement;
 }