More fixes for failures on the Windows bot

pkg/analyzer/test/file_system/physical_resource_provider_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 test.physical_file_system;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
 import 'package:watcher/watcher.dart';
 
 import '../reflective_tests.dart';
+import '../utils.dart';
 
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   runReflectiveTests(PhysicalResourceProviderTest);
   runReflectiveTests(FileTest);
   runReflectiveTests(FolderTest);
 }
 
 var _isFile = new isInstanceOf<File>();
 var _isFileSystemException = new isInstanceOf<FileSystemException>();
 var _isFolder = new isInstanceOf<Folder>();
 
 @reflectiveTest
@@ skipping 408 matching lines @@
 
   setUp() {
     tempDirectory = io.Directory.systemTemp.createTempSync('test_resource');
     tempPath = tempDirectory.absolute.path;
   }
 
   tearDown() {
     tempDirectory.deleteSync(recursive: true);
   }
 }