Revert of Remove reference counting from HttpNetworkSession.

net/http/http_network_layer_unittest.cc

Index: net/http/http_network_layer_unittest.cc
diff --git a/net/http/http_network_layer_unittest.cc b/net/http/http_network_layer_unittest.cc
index 25c5ad723349f605883e6065d15dde63c5aee963..9128cdd3da87986fb716c65ed757404437abd595 100644
--- a/net/http/http_network_layer_unittest.cc
+++ b/net/http/http_network_layer_unittest.cc
@@ -45,7 +45,7 @@
     session_params.ssl_config_service = ssl_config_service_.get();
     session_params.http_server_properties =
         http_server_properties_.GetWeakPtr();
-    network_session_.reset(new HttpNetworkSession(session_params));
+    network_session_ = new HttpNetworkSession(session_params);
     factory_.reset(new HttpNetworkLayer(network_session_.get()));
   }
 
@@ -259,7 +259,7 @@
   scoped_ptr<TransportSecurityState> transport_security_state_;
   scoped_ptr<ProxyService> proxy_service_;
   const scoped_refptr<SSLConfigService> ssl_config_service_;
-  scoped_ptr<HttpNetworkSession> network_session_;
+  scoped_refptr<HttpNetworkSession> network_session_;
   scoped_ptr<HttpNetworkLayer> factory_;
   HttpServerPropertiesImpl http_server_properties_;
 };