New OutputStream interface

runtime/bin/socket.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 ServerSocket factory _ServerSocket {
   /*
    * Constructs a new server socket, binds it to a given address and port,
    * and listens on it.
    */
   ServerSocket(String bindAddress, int port, int backlog);
@@ skipping 92 matching lines @@
    * Returns output stream of the socket.
    */
   OutputStream get outputStream();
 
   /*
    * Returns the port used by this socket.
    */
   int get port();
 
   /*
-   * Closes the socket
+   * Closes the socket. Calling [close] will never throw an exception
+   * and calling it several times is supported.
    */
   void close();
 }
 
 
 class SocketIOException implements Exception {
   const SocketIOException([String this.message = ""]);
   String toString() => "SocketIOException: $message";
 
   /*
    * Contains the exception message.
    */
   final String message;
 }