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

net/dns/host_resolver_impl.h

Index: net/dns/host_resolver_impl.h
diff --git a/net/dns/host_resolver_impl.h b/net/dns/host_resolver_impl.h
index 2d93258b167c25354b852068b3c5afeed7a1efd3..e7f5f6541ca9e3456f4bf15c05464cb16737939e 100644
--- a/net/dns/host_resolver_impl.h
+++ b/net/dns/host_resolver_impl.h
@@ -279,6 +279,10 @@ class NET_EXPORT HostResolverImpl
   // explicit setting in |default_address_family_| is used.
   bool probe_ipv6_support_;
 
+  // True if DnsConfigService detected that system configuration depends on
+  // local IPv6 connectivity. Disables probing.
+  bool use_local_ipv6_;
+
   // True iff ProcTask has successfully resolved a hostname known to have IPv6
   // addresses using ADDRESS_FAMILY_UNSPECIFIED. Reset on IP address change.
   bool resolved_known_ipv6_hostname_;