[net/dns] Treat Name Resolution Policy Table as unhandled option.

net/dns/dns_config_service.h

 // 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.
 
 #ifndef NET_DNS_DNS_CONFIG_SERVICE_H_
 #define NET_DNS_DNS_CONFIG_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 65 matching lines @@
   // Minimum number of dots before global resolution precedes |search|.
   int ndots;
   // Time between retransmissions, see res_state.retrans.
   base::TimeDelta timeout;
   // Maximum number of attempts, see res_state.retry.
   int attempts;
   // Round robin entries in |nameservers| for subsequent requests.
   bool rotate;
   // Enable EDNS0 extensions.
   bool edns0;
+
+  // Indicates system configuration uses local IPv6 connectivity, e.g.,
+  // DirectAccess. This is exposed for HostResolver to skip IPv6 probes,
+  // as it may cause them to return incorrect results.
+  bool use_local_ipv6;
 };
 
 
 // Service for reading system DNS settings, on demand or when signalled by
 // internal watchers and NetworkChangeNotifier.
 class NET_EXPORT_PRIVATE DnsConfigService
     : NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   // Callback interface for the client, called on the same thread as
   // ReadConfig() and WatchConfig().
@@ skipping 73 matching lines @@
 
   // Started in Invalidate*, cleared in On*Read.
   base::OneShotTimer<DnsConfigService> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsConfigService);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_CONFIG_SERVICE_H_