Remove uses of Path class from tests/standalone.

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 "package:expect/expect.dart";
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
@@ skipping 386 matching lines @@
     });
   }
 
   static void testCurrent() {
     Directory current = Directory.current;
     if (Platform.operatingSystem != "windows") {
       Expect.equals("/", current.path.substring(0, 1));
     }
   }
 
-  static void testFromPath() {
+  static void testEquals() {
     var name = new File('.').fullPathSync();
     Directory current1 = new Directory(name);
-    var path = new Path(name);
-    Directory current2 = new Directory.fromPath(path);
+    Directory current2 = new Directory(name);
     Expect.equals(current1.path, current2.path);
     Expect.isTrue(current1.existsSync());
   }
 
   static void testMain() {
     testListing();
     testListingTailingPaths();
     testListNonExistent();
     testListTooLongName();
     testDeleteNonExistent();
     testDeleteTooLongName();
     testDeleteNonExistentSync();
     testDeleteTooLongNameSync();
     testExistsCreateDelete();
     testExistsCreateDeleteSync();
     testDeleteLinkSync();
     testDeleteLinkAsFileSync();
     testDeleteBrokenLinkAsFileSync();
     testListBrokenLinkSync();
     testListLinkSync();
     testCreateTemp();
     testCreateDeleteTemp();
     testCurrent();
-    testFromPath();
+    testEquals();
   }
 }
 
 
 class NestedTempDirectoryTest {
   List<Directory> createdDirectories;
   Directory current;
 
   NestedTempDirectoryTest.run()
       : createdDirectories = new List<Directory>() {
@@ skipping 188 matching lines @@
   testCreateTempErrorSync();
   testCreateTempError();
   testCreateExistingSync();
   testCreateExisting();
   testCreateDirExistingFileSync();
   testCreateDirExistingFile();
   testCreateRecursive();
   testCreateRecursiveSync();
   testRename();
 }