Rename FLAGS_quic_enable_version_39 to FLAGS_quic_reloadable_flag_quic_enable_version_39.

net/tools/quic/end_to_end_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <sys/epoll.h>
 
 #include <cstdint>
 #include <list>
 #include <memory>
@@ skipping 3018 matching lines @@
   void OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame) override {
     ++num_window_update_frames_;
   }
 
  private:
   size_t num_window_update_frames_;
 };
 
 TEST_P(EndToEndTest, WindowUpdateInAck) {
   FLAGS_quic_reloadable_flag_quic_enable_version_38 = true;
-  FLAGS_quic_enable_version_39 = true;
+  FLAGS_quic_reloadable_flag_quic_enable_version_39 = true;
   ASSERT_TRUE(Initialize());
   EXPECT_TRUE(client_->client()->WaitForCryptoHandshakeConfirmed());
   WindowUpdateObserver observer;
   QuicConnection* client_connection =
       client_->client()->session()->connection();
   client_connection->set_debug_visitor(&observer);
   QuicVersion version = client_connection->version();
   // 100KB body.
   string body(100 * 1024, 'a');
   SpdyHeaderBlock headers;
@@ skipping 59 matching lines @@
   client_->WaitForResponse();
   EXPECT_EQ(kBarResponseBody, client_->response_body());
   QuicConnectionStats client_stats =
       client_->client()->session()->connection()->GetStats();
   EXPECT_EQ(0u, client_stats.packets_lost);
   EXPECT_EQ(1, client_->client()->GetNumSentClientHellos());
 }
 }  // namespace
 }  // namespace test
 }  // namespace net