net/dns: Fix the last warning found by chromium-style clang plugin on Windows.

net/dns/dns_config_service_win.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_win.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 418 matching lines @@
                                  primary_suffix.end(), '.');
 
   for (size_t offset = 0; num_dots >= devolution.level.value; --num_dots) {
     offset = primary_suffix.find('.', offset + 1);
     config->search.push_back(primary_suffix.substr(offset + 1));
   }
 }
 
 }  // namespace
 
+DnsSystemSettings::DnsSystemSettings()
+    : policy_search_list(),
+      tcpip_search_list(),
+      tcpip_domain(),
+      primary_dns_suffix(),
+      policy_devolution(),
+      dnscache_devolution(),
+      tcpip_devolution(),
+      append_to_multi_label_name(),
+      have_name_resolution_policy(false) {
+}
+
+DnsSystemSettings::~DnsSystemSettings() {
+}
+
 bool ParseSearchList(const base::string16& value,
                      std::vector<std::string>* output) {
   DCHECK(output);
   if (value.empty())
     return false;
 
   output->clear();
 
   // If the list includes an empty hostname (",," or ", ,"), it is terminated.
   // Although nslookup and network connection property tab ignore such
@@ skipping 302 matching lines @@
 }
 
 }  // namespace internal
 
 // static
 scoped_ptr<DnsConfigService> DnsConfigService::CreateSystemService() {
   return scoped_ptr<DnsConfigService>(new internal::DnsConfigServiceWin());
 }
 
 }  // namespace net