Remove "Default Address Family" behavior from the HostResolver.

net/dns/host_resolver.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/host_resolver.h"
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ skipping 82 matching lines @@
     : host_port_pair_(host_port_pair),
       address_family_(ADDRESS_FAMILY_UNSPECIFIED),
       host_resolver_flags_(0),
       allow_cached_response_(true),
       is_speculative_(false),
       is_my_ip_address_(false) {}
 
 HostResolver::~HostResolver() {
 }
 
-AddressFamily HostResolver::GetDefaultAddressFamily() const {
-  return ADDRESS_FAMILY_UNSPECIFIED;
-}
-
 void HostResolver::SetDnsClientEnabled(bool enabled) {
 }
 
 HostCache* HostResolver::GetHostCache() {
   return NULL;
 }
 
 base::Value* HostResolver::GetDnsConfigAsValue() const {
   return NULL;
 }
 
 // static
 scoped_ptr<HostResolver> HostResolver::CreateSystemResolver(
     const Options& options,
     NetLog* net_log) {
   return scoped_ptr<HostResolver>(new HostResolverImpl(options, net_log));
 }
 
 // static
 scoped_ptr<HostResolver> HostResolver::CreateDefaultResolver(NetLog* net_log) {
   return scoped_ptr<HostResolver>(new HostResolverImpl(Options(), net_log));
 }
 
 HostResolver::HostResolver() {
 }
 
 }  // namespace net