Revert of Remove reference counting from HttpNetworkSession.

net/http/http_proxy_client_socket_pool_unittest.cc

Index: net/http/http_proxy_client_socket_pool_unittest.cc
diff --git a/net/http/http_proxy_client_socket_pool_unittest.cc b/net/http/http_proxy_client_socket_pool_unittest.cc
index bbd7e31ee30e9dca82485022e6d91cb3ab954b39..6b44dbbee495857cc6cba401724eb66d474e751a 100644
--- a/net/http/http_proxy_client_socket_pool_unittest.cc
+++ b/net/http/http_proxy_client_socket_pool_unittest.cc
@@ -287,7 +287,7 @@
     ssl_data_->SetNextProto(GetParam().protocol);
   }
 
-  scoped_ptr<HttpNetworkSession> CreateNetworkSession() {
+  HttpNetworkSession* CreateNetworkSession() {
     return SpdySessionDependencies::SpdyCreateSession(&session_deps_);
   }
 
@@ -303,7 +303,7 @@
   scoped_ptr<CertVerifier> cert_verifier_;
   SSLClientSocketPool ssl_socket_pool_;
 
-  const scoped_ptr<HttpNetworkSession> session_;
+  const scoped_refptr<HttpNetworkSession> session_;
 
  protected:
   SpdyTestUtil spdy_util_;