Allow Directory.create to create all missing path components.

tests/standalone/io/file_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.
 //
 // Dart test program for testing file I/O.
 
 #import("dart:io");
 #import("dart:isolate");
 
 class MyListOfOneElement implements List {
@@ skipping 18 matching lines @@
   }
 
   static void createTempDirectory(Function doNext) {
     new Directory('').createTemp().then((temp) {
       tempDirectory = temp;
       doNext();
     });
   }
 
   static void deleteTempDirectory() {
-    tempDirectory.deleteRecursivelySync();
+    tempDirectory.deleteSync(recursive: true);
   }
 
   // Test for file read functionality.
   static void testReadStream() {
     // Read a file and check part of it's contents.
     String filename = getFilename("bin/file_test.cc");
     File file = new File(filename);
     InputStream input = file.openInputStream();
     input.onData = () {
       List<int> buffer = new List<int>(42);
@@ skipping 1278 matching lines @@
       testDirectorySync();
       testWriteStringUtf8();
       testWriteStringUtf8Sync();
     });
   }
 }
 
 main() {
   FileTest.testMain();
 }