Revert "Update the test runner to use the new dart:io API" again

tests/standalone/io/status_file_parser_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 library StatusFileParserTest;
 
 import "dart:io";
 import "../../../tools/testing/dart/status_file_parser.dart";
 
 
 void main() {
@@ skipping 18 matching lines @@
     return filePath;
   } else {
     return "../${filePath}";
   }
 }
 
 void TestReadStatusFile(String filePath) {
   File file = new File(fixedFilePath(filePath));
   if (file.existsSync()) {
     List<Section> sections = new List<Section>();
-    ReadConfigurationInto(file.path, sections, () {
+    ReadConfigurationInto(file.name, sections, () {
       Expect.isTrue(sections.length > 0);
     });
   }
 }