Change core lib, dart2js, and more for new optional parameters syntax

runtime/bin/socket_stream_impl.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.
 
 class _SocketInputStream implements SocketInputStream {
   _SocketInputStream(Socket socket) : _socket = socket {
     if (_socket._closed) _closed = true;
     _socket.onClosed = _onClosed;
   }
 
@@ skipping 27 matching lines @@
   int readInto(List<int> buffer, [int offset = 0, int len]) {
     if (_closed) return null;
     if (len === null) len = buffer.length;
     if (offset < 0) throw new StreamException("Illegal offset $offset");
     if (len < 0) throw new StreamException("Illegal length $len");
     return _socket.readList(buffer, offset, len);
   }
 
   int available() => _socket.available();
 
-  void pipe(OutputStream output, [bool close = true]) {
+  void pipe(OutputStream output, {bool close: true}) {
     _pipe(this, output, close: close);
   }
 
   void close() {
     if (!_closed) {
       _socket.close();
     }
   }
 
   bool get closed => _closed;
@@ skipping 162 matching lines @@
     }
   }
 
   Socket _socket;
   _BufferList _pendingWrites;
   Function _onNoPendingWrites;
   Function _onClosed;
   bool _closing = false;
   bool _closed = false;
 }