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

net/curvecp/test_client.cc

Index: net/curvecp/test_client.cc
diff --git a/net/curvecp/test_client.cc b/net/curvecp/test_client.cc
index f5ad5ca288132593911b2e85d77810f493679f00..67bd7b8d4c00626804f07e3e2490a855fa5b040e 100644
--- a/net/curvecp/test_client.cc
+++ b/net/curvecp/test_client.cc
@@ -46,7 +46,7 @@ bool TestClient::Start(const HostPortPair& server_host_port_pair,
   bytes_to_read_ = bytes_to_send_ = bytes_to_send;
 
   scoped_ptr<HostResolver> system_host_resolver(
-      CreateSystemHostResolver(1, 0, NULL));
+      HostResolver::CreateDefaultResolver(NULL));
   SingleRequestHostResolver host_resolver(system_host_resolver.get());
   HostResolver::RequestInfo request(server_host_port_pair);
   AddressList addresses;