[net] HostResolverImpl + DnsTransaction + DnsConfigService = Asynchronous DNS ready for experiments.

net/dns/dns_config_service_win.cc

Index: net/dns/dns_config_service_win.cc
diff --git a/net/dns/dns_config_service_win.cc b/net/dns/dns_config_service_win.cc
index e08938770158fb89a24cd955012c695dabc71062..15e7bfb7a1237d22a14acd72d57dfd000798e305 100644
--- a/net/dns/dns_config_service_win.cc
+++ b/net/dns/dns_config_service_win.cc
@@ -454,8 +454,8 @@ void DnsConfigServiceWin::Watch() {
 }
 
 // static
-DnsConfigService* DnsConfigService::CreateSystemService() {
-  return new DnsConfigServiceWin();
+scoped_ptr<DnsConfigService> DnsConfigService::CreateSystemService() {
+  return scoped_ptr<DnsConfigService>(new DnsConfigServiceWin());
 }
 
 }  // namespace net