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

tools/html_json_doc/test/html_json_doc_test.dart

 import '../../../pkg/unittest/lib/unittest.dart';
 import '../lib/html_to_json.dart' as html_to_json;
 import '../lib/json_to_html.dart' as json_to_html;
 import 'dart:json';
 import 'dart:io';
 
 void main() {
   var scriptPath = new Path(new Options().script).directoryPath.toString();
 
   test('HTML Doc to JSON', () {
@@ skipping 63 matching lines @@
   };
 }
 
 Future _copyFiles(Path fromDir, Path toDir) {
   // First copy the files into a new place to keep the old files.
   final completer = new Completer();
   final htmlDir = new Directory.fromPath(fromDir);
   final lister = htmlDir.list(recursive: false);
 
   lister.onFile = (String path) {
-    final name = new Path.fromNative(path).filename;
+    final name = new Path(path).filename;
 
     // Ignore private classes.
     if (name.startsWith('_')) return;
 
     // Ignore non-dart files.
     if (!name.endsWith('.dart')) return;
 
     File file = new File(path);
     File newFile = new File.fromPath(toDir.append(name));
 
     var outputStream = newFile.openOutputStream();
     outputStream.writeString(file.readAsStringSync());
   };
 
   lister.onDone = (_) {
     completer.complete(null);
   };
   return completer.future;
-}
+}