Fix uninitialized reads in DnsConfigServiceWin tests.

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 428 matching lines @@
 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) {
+  policy_search_list.set = false;
+  tcpip_search_list.set = false;
+  tcpip_domain.set = false;
+  primary_dns_suffix.set = false;
+
+  policy_devolution.enabled.set = false;
+  policy_devolution.level.set = false;
+  dnscache_devolution.enabled.set = false;
+  dnscache_devolution.level.set = false;
+  tcpip_devolution.enabled.set = false;
+  tcpip_devolution.level.set = false;
+
+  append_to_multi_label_name.set = false;
 }
 
 DnsSystemSettings::~DnsSystemSettings() {
 }
 
 bool ParseSearchList(const base::string16& value,
                      std::vector<std::string>* output) {
   DCHECK(output);
   if (value.empty())
     return false;
@@ skipping 307 matching lines @@
 }
 
 }  // namespace internal
 
 // static
 scoped_ptr<DnsConfigService> DnsConfigService::CreateSystemService() {
   return scoped_ptr<DnsConfigService>(new internal::DnsConfigServiceWin());
 }
 
 }  // namespace net