Remove non-ascii file names from repo and generate them in tests instead.

tests/standalone/io/directory_non_ascii_test.dart

 // 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.
 
 import 'dart:io';
 import 'dart:isolate';
 
 main() {
   var port = new ReceivePort();
-  Directory scriptDir = new File(new Options().script).directorySync();
-  var d = new Directory("${scriptDir.path}/æøå");
+
   // On MacOS you get the decomposed utf8 form of file and directory
   // names from the system. Therefore, we have to check for both here.
   var precomposed = 'æøå';
   var decomposed = new String.fromCharCodes([47, 230, 248, 97, 778]);
-  d.exists().then((e) {
-    Expect.isTrue(e);
-    d.create().then((_) {
-      new Directory('').createTemp().then((temp) {
-        new Directory("${temp.path}/æøå").createTemp().then((temp2) {
-          Expect.isTrue(temp2.path.contains(precomposed) ||
-                        temp2.path.contains(decomposed));
-          temp2.delete().then((_) {
-            temp.delete(recursive: true).then((_) {
-              port.close();
+
+  new Directory('').createTemp().then((tempDir) {
+    var nonAsciiDir = new Directory("${tempDir.path}/æøå");
+    nonAsciiDir.exists().then((e) {
+      Expect.isFalse(e);
+      nonAsciiDir.create().then((_) {
+        nonAsciiDir.exists().then((e) {
+          Expect.isTrue(e);
+          new Directory("${tempDir.path}/æøå").createTemp().then((temp) {
+            Expect.isTrue(temp.path.contains(precomposed) ||
+                          temp.path.contains(decomposed));
+            temp.delete().then((_) {
+              tempDir.delete(recursive: true).then((_) {
+                Expect.isFalse(temp.existsSync());
+                Expect.isFalse(nonAsciiDir.existsSync());
+                port.close();
+              });
             });
           });
         });
       });
     });
   });
 }