Fix extraction of environment variables on Windows.

tests/standalone/io/windows_environment_script.dart

Index: tests/standalone/io/windows_environment_script.dart
diff --git a/tests/standalone/io/many_directory_operations_test.dart b/tests/standalone/io/windows_environment_script.dart
similarity index 55%
copy from tests/standalone/io/many_directory_operations_test.dart
copy to tests/standalone/io/windows_environment_script.dart
index 4470eaa4ad5024a4686ba2ef79b61a6df59fc28a..d94a52cb582f519320579a95f514db50c3770555 100644
--- a/tests/standalone/io/many_directory_operations_test.dart
+++ b/tests/standalone/io/windows_environment_script.dart
@@ -1,13 +1,12 @@
 // Copyright (c) 2012, 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.
-//
-// Dart test program for testing using a lot of native port operations.
 
 #import("dart:io");
 
 main() {
-  for (var i = 0; i < 10000; i++) {
-    new Directory(".").exists().then((result) => null);
-  }
+  var scriptDir = Platform.environment['SCRIPTDIR'];
+  Expect.isTrue(scriptDir.contains('å'));
+  var str = new File('$scriptDir/funky.bat').readAsStringSync();
+  Expect.isTrue(str.contains('%~dp0'));
 }