Allow Directory.create to create all missing path components.

tests/standalone/io/file_output_stream_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.
 // Testing file input stream, VM-only, standalone test.
 
 #import("dart:io");
 #import("dart:isolate");
 
 void testOpenOutputStreamSync() {
   Directory tempDirectory = new Directory('').createTempSync();
@@ skipping 20 matching lines @@
   };
 }
 
 
 void testOutputStreamNoPendingWrite() {
   var tempDirectory;
 
   // Create a port for waiting on the final result of this test.
   ReceivePort done = new ReceivePort();
   done.receive((message, replyTo) {
-    tempDirectory.deleteRecursively().then((ignore) => done.close());
+    tempDirectory.delete(recursive: true).then((ignore) => done.close());
   });
 
   new Directory('').createTemp().then((temp) {
     tempDirectory = temp;
     String fileName = "${tempDirectory.path}/test";
     File file = new File(fileName);
     file.create().then((ignore) {
       OutputStream stream = file.openOutputStream();
       final total = 100;
       var count = 0;
@@ skipping 45 matching lines @@
   };
   x.close();
   x.onError = (e) => Expect.fail("No error expected");
 }
 
 main() {
   testOpenOutputStreamSync();
   testOutputStreamNoPendingWrite();
   testOutputStreamFlush();
 }