Minor changes to the dart:io library files.

runtime/bin/socket_stream_impl.dart

-// Copyright (c) 2011, 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.
 
-class SocketInputStream implements InputStream {
-  SocketInputStream(Socket socket) : _socket = socket {
+class _SocketInputStream implements SocketInputStream {
+  _SocketInputStream(Socket socket) : _socket = socket {
     _socket.closeHandler = _closeHandler;
   }
 
   List<int> read([int len]) {
     int bytesToRead = available();
     if (bytesToRead == 0) return null;
     if (len !== null) {
       if (len <= 0) {
         throw new StreamException("Illegal length $len");
       } else if (bytesToRead > len) {
@@ skipping 51 matching lines @@
     _closed = true;
     if (_clientCloseHandler !== null) _clientCloseHandler();
   }
 
   Socket _socket;
   Function _clientCloseHandler;
   bool _closed = false;
 }
 
 
-class SocketOutputStream implements OutputStream {
-  SocketOutputStream(Socket socket)
+class _SocketOutputStream implements SocketOutputStream {
+  _SocketOutputStream(Socket socket)
       : _socket = socket, _pendingWrites = new _BufferList();
 
   bool write(List<int> buffer, [bool copyBuffer = true]) {
     return _write(buffer, 0, buffer.length, copyBuffer);
   }
 
   bool writeFrom(List<int> buffer, [int offset = 0, int len]) {
     return _write(
         buffer, offset, (len == null) ? buffer.length - offset : len, true);
   }
@@ skipping 90 matching lines @@
     if (_streamErrorHandler != null) _streamErrorHandler();
   }
 
   Socket _socket;
   _BufferList _pendingWrites;
   var _noPendingWriteHandler;
   var _streamErrorHandler;
   bool _closing = false;
   bool _closed = false;
 }