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

net/dns/dns_test_util.cc

 // Copyright (c) 2012 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/dns/dns_test_util.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 68 matching lines @@
 
       // Size of RDATA which is a IPv4 or IPv6 address.
       size_t rdata_size = qtype_ == net::dns_protocol::kTypeA ?
                           net::kIPv4AddressSize : net::kIPv6AddressSize;
 
       // 12 is the sum of sizes of the compressed name reference, TYPE,
       // CLASS, TTL and RDLENGTH.
       size_t answer_size = 12 + rdata_size;
 
       // Write answer with loopback IP address.
-      reinterpret_cast<dns_protocol::Header*>(buffer)->ancount = htons(1);
+      reinterpret_cast<dns_protocol::Header*>(buffer)->ancount =
+          base::HostToNet16(1);
       BigEndianWriter writer(buffer + nbytes, answer_size);
       writer.WriteU16(kPointerToQueryName);
       writer.WriteU16(qtype_);
       writer.WriteU16(net::dns_protocol::kClassIN);
       writer.WriteU32(kTTL);
       writer.WriteU16(rdata_size);
       if (qtype_ == net::dns_protocol::kTypeA) {
         char kIPv4Loopback[] = { 0x7f, 0, 0, 1 };
         writer.WriteBytes(kIPv4Loopback, sizeof(kIPv4Loopback));
       } else {
@@ skipping 60 matching lines @@
 // static
 scoped_ptr<DnsClient> CreateMockDnsClient(const DnsConfig& config) {
   return scoped_ptr<DnsClient>(new MockDnsClient(config));
 }
 
 void MockDnsConfigService::Watch(const CallbackType& callback) {
   set_callback(callback);
 }
 
 }  // namespace net
-