Default constructor for dart:io Path now handles native Windows paths. Path() now does the same as…

tests/standalone/io/directory_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.
 //
 // Directory listing test.
 
 import "dart:io";
 import "dart:isolate";
 
 class DirectoryTest {
@@ skipping 371 matching lines @@
   static void testCurrent() {
     Directory current = new Directory.current();
     if (Platform.operatingSystem != "windows") {
       Expect.equals("/", current.path.substring(0, 1));
     }
   }
 
   static void testFromPath() {
     var name = new File('.').fullPathSync();
     Directory current1 = new Directory(name);
-    var path = new Path.fromNative(name);
+    var path = new Path(name);
     Directory current2 = new Directory.fromPath(path);
     Expect.equals(current1.path, current2.path);
     Expect.isTrue(current1.existsSync());
   }
 
   static void testMain() {
     testListing();
     testListNonExistent();
     testListTooLongName();
     testDeleteNonExistent();
@@ skipping 208 matching lines @@
   testCreateTempErrorSync();
   testCreateTempError();
   testCreateExistingSync();
   testCreateExisting();
   testCreateDirExistingFileSync();
   testCreateDirExistingFile();
   testCreateRecursive();
   testCreateRecursiveSync();
   testRename();
 }