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

net/base/host_resolver_proc.cc

 // Copyright (c) 2011 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/host_resolver_proc.h"
 
 #include "build/build_config.h"
 
 #include "base/logging.h"
+#include "base/sys_byteorder.h"
 #include "net/base/address_list.h"
 #include "net/base/dns_reloader.h"
 #include "net/base/net_errors.h"
 #include "net/base/sys_addrinfo.h"
 
 #if defined(OS_OPENBSD)
 #define AI_ADDRCONFIG 0
 #endif
 
 namespace net {
 
 namespace {
 
 bool IsAllLocalhostOfOneFamily(const struct addrinfo* ai) {
   bool saw_v4_localhost = false;
   bool saw_v6_localhost = false;
   for (; ai != NULL; ai = ai->ai_next) {
     switch (ai->ai_family) {
       case AF_INET: {
         const struct sockaddr_in* addr_in =
             reinterpret_cast<struct sockaddr_in*>(ai->ai_addr);
-        if ((ntohl(addr_in->sin_addr.s_addr) & 0xff000000) == 0x7f000000)
+        if ((base::NetToHost32(addr_in->sin_addr.s_addr) & 0xff000000) ==
+            0x7f000000)
           saw_v4_localhost = true;
         else
           return false;
         break;
       }
       case AF_INET6: {
         const struct sockaddr_in6* addr_in6 =
             reinterpret_cast<struct sockaddr_in6*>(ai->ai_addr);
         if (IN6_IS_ADDR_LOOPBACK(&addr_in6->sin6_addr))
           saw_v6_localhost = true;
@@ skipping 190 matching lines @@
 #endif
 
     return ERR_NAME_NOT_RESOLVED;
   }
 
   *addrlist = AddressList::CreateByAdoptingFromSystem(ai);
   return OK;
 }
 
 }  // namespace net