Fix a few bugs breaking the pub tests.

utils/pub/io.dart

 // Copyright (c) 2013, 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.
 
 /// Helper functionality to make working with IO easier.
 library io;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
@@ skipping 107 matching lines @@
 /// Creates a temp directory whose name will be based on [dir] with a unique
 /// suffix appended to it. If [dir] is not provided, a temp directory will be
 /// created in a platform-dependent temporary location. Returns the path of the
 /// created directory.
 String createTempDir([dir = '']) {
   var tempDir = new Directory(dir).createTempSync();
   log.io("Created temp directory ${tempDir.path}");
   return tempDir.path;
 }
 
-// TODO(nweiz): rename includeHiddenFiles to includeHidden.
 /// Lists the contents of [dir]. If [recursive] is `true`, lists subdirectory
-/// contents (defaults to `false`). If [includeHiddenFiles] is `true`, includes
-/// files and directories beginning with `.` (defaults to `false`).
+/// contents (defaults to `false`). If [includeHidden] is `true`, includes files
+/// and directories beginning with `.` (defaults to `false`).
 ///
 /// The returned paths are guaranteed to begin with [dir].
 List<String> listDir(String dir, {bool recursive: false,
     bool includeHidden: false}) {
   List<String> doList(String dir, Set<String> listedDirectories) {
     var contents = <String>[];
 
     // Avoid recursive symlinks.
     var resolvedPath = new File(dir).fullPathSync();
     if (listedDirectories.contains(resolvedPath)) return [];
@@ skipping 593 matching lines @@
   const PubProcessResult(this.stdout, this.stderr, this.exitCode);
 
   bool get success => exitCode == 0;
 }
 
 /// Gets a [Uri] for [uri], which can either already be one, or be a [String].
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return Uri.parse(uri);
 }