Fix some failures on the windows bots

pkg/analyzer/test/generated/incremental_resolver_test.dart

 // Copyright (c) 2014, 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 analyzer.test.generated.incremental_resolver_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
@@ skipping 126 matching lines @@
   }
 }
 
 @reflectiveTest
 class IncrementalResolverTest extends ResolverTestCase {
   Source source;
   String code;
   LibraryElement library;
   CompilationUnit unit;
 
-  @override
-  void reset() {
-    analysisContext2 = AnalysisContextFactory.contextWithCore();
-  }
-
-  @override
-  void resetWithOptions(AnalysisOptions options) {
-    AnalysisContextFactory.contextWithCoreAndOptions(options);
-  }
-
   void setUp() {
     super.setUp();
     logging.logger = logging.NULL_LOGGER;
   }
 
   void test_classMemberAccessor_body() {
     _resolveUnit(r'''
 class A {
   int get test {
     return 1 + 2;
@@ skipping 2183 matching lines @@
   void logException(Object exception, [Object stackTrace]) {
     lastException = exception;
     lastStackTrace = stackTrace;
   }
 
   @override
   logging.LoggingTimer startTimer() {
     return new logging.LoggingTimer(this);
   }
 }