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

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:async';
 import 'dart:io';
 import 'dart:isolate';
 
@@ skipping 963 matching lines @@
       Expect.isTrue(e is FileIOException);
     }
   }
 
   static void testOpenFileFromPath() {
     var name = getFilename("tests/vm/data/fixed_length_file");
     var path = new Path(name);
     var f = new File.fromPath(path);
     Expect.isTrue(f.existsSync());
     name = f.fullPathSync();
-    path = new Path.fromNative(name);
+    path = new Path(name);
     var g = new File.fromPath(path);
     Expect.isTrue(g.existsSync());
     Expect.equals(name, g.fullPathSync());
   }
 
   static void testReadAsBytes() {
     var port = new ReceivePort();
     port.receive((result, replyTo) {
       port.close();
       Expect.equals(42, result);
@@ skipping 326 matching lines @@
       testDirectorySync();
       testWriteStringUtf8();
       testWriteStringUtf8Sync();
     });
   }
 }
 
 main() {
   FileTest.testMain();
 }