Revert of Remove reference counting from HttpNetworkSession.

net/quic/quic_end_to_end_unittest.cc

Index: net/quic/quic_end_to_end_unittest.cc
diff --git a/net/quic/quic_end_to_end_unittest.cc b/net/quic/quic_end_to_end_unittest.cc
index fdcaec9eeb0955873044fa443b2a4221063d3eb4..02290340f65139c22090af305164112d824410ba 100644
--- a/net/quic/quic_end_to_end_unittest.cc
+++ b/net/quic/quic_end_to_end_unittest.cc
@@ -48,7 +48,7 @@
 // Factory for creating HttpTransactions, used by TestTransactionConsumer.
 class TestTransactionFactory : public HttpTransactionFactory {
  public:
-  explicit TestTransactionFactory(const HttpNetworkSession::Params& params)
+  TestTransactionFactory(const HttpNetworkSession::Params& params)
       : session_(new HttpNetworkSession(params)) {}
 
   ~TestTransactionFactory() override {}
@@ -65,7 +65,7 @@
   HttpNetworkSession* GetSession() override { return session_.get(); };
 
  private:
-  scoped_ptr<HttpNetworkSession> session_;
+  scoped_refptr<HttpNetworkSession> session_;
 };
 
 }  // namespace