Change the error handling in dart:io

runtime/bin/process.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.
 
 /**
  * [Process] objects are used to start new processes and interact with
  * them.
  */
 interface Process default _Process {
   /**
@@ skipping 69 matching lines @@
    *
    * Throws an [UnsupportedOperationException] if the process is
    * non-interactive.
    */
   void set onExit(void callback(int exitCode));
 
   /**
    * Set an error handler which gets invoked if an operation on the process
    * fails.
    */
-  void set onError(void callback(ProcessException error));
+  void set onError(void callback(e));
 
   /**
    * Kills the process. When the process terminates as a result of
    * calling [kill] [onExit] is called. If the kill operation fails,
    * [onError] is called.
    */
   void kill();
 
   /**
    * Terminates the streams of a process. [close] most be called on a
@@ skipping 60 matching lines @@
   /**
    * Contains the system message for the process exception if any.
    */
   final String message;
 
   /**
    * Contains the OS error code for the process exception if any.
    */
   final int errorCode;
 }