Add some missing includes for IO functions.

net/tools/flip_server/sm_connection.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/flip_server/sm_connection.h"
 
 #include <errno.h>
 #include <netinet/tcp.h>
 #include <sys/socket.h>
+#include <unistd.h>
 
 #include <list>
 #include <string>
 
 #include "net/tools/flip_server/constants.h"
 #include "net/tools/flip_server/flip_config.h"
 #include "net/tools/flip_server/http_interface.h"
 #include "net/tools/flip_server/spdy_interface.h"
 #include "net/tools/flip_server/spdy_ssl.h"
 #include "net/tools/flip_server/streamer_interface.h"
@@ skipping 637 matching lines @@
 SMConnection* SMConnection::NewSMConnection(EpollServer* epoll_server,
                                             SSLState *ssl_state,
                                             MemoryCache* memory_cache,
                                             FlipAcceptor *acceptor,
                                             std::string log_prefix) {
   return new SMConnection(epoll_server, ssl_state, memory_cache,
                           acceptor, log_prefix);
 }
 
 }  // namespace net