[net] Change factory methods for HostResolver and HostCache to return a scoped_ptr

net/test/base_test_server.cc

Index: net/test/base_test_server.cc
diff --git a/net/test/base_test_server.cc b/net/test/base_test_server.cc
index a4d1ff9ecfd061bee34625ddf948fbd4d2f0b911..c31ea16b4598c857538408e1267ff921d5ba2e42 100644
--- a/net/test/base_test_server.cc
+++ b/net/test/base_test_server.cc
@@ -169,10 +169,7 @@ std::string BaseTestServer::GetScheme() const {
 bool BaseTestServer::GetAddressList(AddressList* address_list) const {
   DCHECK(address_list);
 
-  scoped_ptr<HostResolver> resolver(
-      CreateSystemHostResolver(HostResolver::kDefaultParallelism,
-                               HostResolver::kDefaultRetryAttempts,
-                               NULL));
+  scoped_ptr<HostResolver> resolver(HostResolver::CreateDefaultResolver(NULL));
   HostResolver::RequestInfo info(host_port_pair_);
   TestCompletionCallback callback;
   int rv = resolver->Resolve(info, address_list, callback.callback(), NULL,