[net/dns] Hardcode DnsConfig.timeout to 1 second.

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.
+// Default values are taken from glibc resolv.h except timeout which is set to
+// |kDnsTimeoutSeconds|.
 DnsConfig::DnsConfig()
     : append_to_multi_label_name(true),
       ndots(1),
-      timeout(base::TimeDelta::FromSeconds(5)),
+      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 184 matching lines @@
   timer_.Stop();
   if (!need_update_)
     return;
   need_update_ = false;
   last_sent_empty_ = false;
   callback_.Run(dns_config_);
 }
 
 }  // namespace net