[net/dns] Use only NullDnsSocketPool.

net/dns/dns_config_service.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_config_service.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "net/base/ip_endpoint.h"
 
 namespace net {
 
 // Default values are taken from glibc resolv.h except timeout which is set to
 // |kDnsTimeoutSeconds|.
 DnsConfig::DnsConfig()
     : append_to_multi_label_name(true),
-      randomize_ports(true),
+      randomize_ports(false),
       ndots(1),
       timeout(base::TimeDelta::FromSeconds(kDnsTimeoutSeconds)),
       attempts(2),
       rotate(false),
       edns0(false) {}
 
 DnsConfig::~DnsConfig() {}
 
 bool DnsConfig::Equals(const DnsConfig& d) const {
   return EqualsIgnoreHosts(d) && (hosts == d.hosts);
@@ skipping 188 matching lines @@
   if (watch_failed_) {
     // If a watch failed, the config may not be accurate, so report empty.
     callback_.Run(DnsConfig());
   } else {
     callback_.Run(dns_config_);
   }
 }
 
 }  // namespace net