Reduce header dependencies in net/

net/base/tcp_client_socket_libevent.cc

 // Copyright (c) 2006-2008 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/base/tcp_client_socket_libevent.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #include <sys/socket.h>
 
 #include "base/eintr_wrapper.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/trace_event.h"
+#include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "third_party/libevent/event.h"
 
 
 namespace net {
 
 namespace {
 
 const int kInvalidSocket = -1;
 
@@ skipping 337 matching lines @@
     DoWriteCallback(result);
   }
 }
 
 int TCPClientSocketLibevent::GetPeerName(struct sockaddr *name,
                                          socklen_t *namelen) {
   return ::getpeername(socket_, name, namelen);
 }
 
 }  // namespace net