Minor changes to the dart:io library files.

runtime/bin/socket_stream_impl.dart

Index: runtime/bin/socket_stream_impl.dart
diff --git a/runtime/bin/socket_stream.dart b/runtime/bin/socket_stream_impl.dart
similarity index 94%
copy from runtime/bin/socket_stream.dart
copy to runtime/bin/socket_stream_impl.dart
index 1d5852a65ac4edbfb0e31bc19aef861ceaf6e090..e4036333b1e0b8ed14fea09dd89600036c494fca 100644
--- a/runtime/bin/socket_stream.dart
+++ b/runtime/bin/socket_stream_impl.dart
@@ -1,9 +1,9 @@
-// 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;
   }
 
@@ -75,8 +75,8 @@ class SocketInputStream implements InputStream {
 }
 
 
-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]) {