Add base::HostToNetXX() & NetToHostXX(), and use them to replace htonX() & ntohX() in Chrome.

net/socket/socks5_client_socket.cc

Index: net/socket/socks5_client_socket.cc
diff --git a/net/socket/socks5_client_socket.cc b/net/socket/socks5_client_socket.cc
index b8b3439169b6b1c364b970dff2d9df21d6c566aa..f9932a902907c295b7c16cdc9730b04222d40633 100644
--- a/net/socket/socks5_client_socket.cc
+++ b/net/socket/socks5_client_socket.cc
@@ -9,6 +9,7 @@
 #include "base/debug/trace_event.h"
 #include "base/format_macros.h"
 #include "base/string_util.h"
+#include "base/sys_byteorder.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_log.h"
 #include "net/base/net_util.h"
@@ -364,7 +365,7 @@ int SOCKS5ClientSocket::BuildHandshakeWriteBuffer(std::string* handshake)
       host_request_info_.hostname().size()));
   handshake->append(host_request_info_.hostname());
 
-  uint16 nw_port = htons(host_request_info_.port());
+  uint16 nw_port = base::HostToNet16(host_request_info_.port());
   handshake->append(reinterpret_cast<char*>(&nw_port), sizeof(nw_port));
   return OK;
 }