Update test scripts to deal with current VM behavior on optional constructor arguments.

runtime/bin/socket_stream.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.
 
 class SocketInputStream implements InputStream {
   SocketInputStream(Socket socket) : _socket = socket;
 
   List<int> read([int len]) {
     int bytesToRead = available();
     if (bytesToRead == 0) return null;
@@ skipping 38 matching lines @@
   }
 
   Socket _socket;
 }
 
 
 class SocketOutputStream implements OutputStream {
   SocketOutputStream(Socket socket)
       : _socket = socket, _pendingWrites = new _BufferList();
 
-    bool write(List<int> buffer, [bool copyBuffer = true]) {
+  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);
   }
 
   void close() {
     if (!_pendingWrites.isEmpty()) {
@@ skipping 86 matching lines @@
     if (_streamErrorHandler != null) _streamErrorHandler();
   }
 
   Socket _socket;
   _BufferList _pendingWrites;
   var _noPendingWriteHandler;
   var _streamErrorHandler;
   bool _closing = false;
   bool _closed = false;
 }