Fix a couple of minor issues in IO libraries.

runtime/bin/directory.dart

 // Copyright (c) 2011, 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.
 
 interface Directory default _Directory {
   /**
    * Creates a directory object. The path is either a full path or
    * relative to the directory in which the Dart VM was
    * started.
    */
@@ skipping 99 matching lines @@
 
   /**
    * Set the handler that is called when a directory is successfully created.
    */
   void set createHandler(void createHandler());
 
   /**
    * Set the handler that is called when a temporary directory is
    * successfully created.
    */
-  void set createTempHandler(void doneHandler(bool completed));
+  void set createTempHandler(void createTempHandler());
 
   /**
    * Set the handler that is called when a directory is successfully
    * deleted.
    */
   void set deleteHandler(void deleteHandler());
 
   /**
    * Sets the handler that is called if there is an error while listing
    * or creating directories.
    */
   void set errorHandler(void errorHandler(String error));
 
   /**
    * Gets the path of this directory.
    */
   final String path;
 }
 
 
 class DirectoryException {
   const DirectoryException([String this.message, int this.errorCode = 0]);
   String toString() => "DirectoryException: $message";
   final String message;
   final int errorCode;
 }