API changes to Write path Session on down for FEC protection.

net/quic/test_tools/quic_packet_generator_peer.h

-// Copyright (c) 2014 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.
-
-#ifndef NET_QUIC_TEST_TOOLS_QUIC_PACKET_GENERATOR_PEER_H_
-#define NET_QUIC_TEST_TOOLS_QUIC_PACKET_GENERATOR_PEER_H_
-
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-class QuicPacketGenerator;
-
-namespace test {
-
-class QuicPacketGeneratorPeer {
- public:
-  static void MaybeStartFecProtection(QuicPacketGenerator* generator);
-
-  static void MaybeStopFecProtection(QuicPacketGenerator* generator,
-                                     bool force);
-
-  // Convenience method for connection and above. Enables and turns on FEC
-  // protection in the generator.
-  static void SwitchFecProtectionOn(QuicPacketGenerator* generator,
-                                    size_t max_packets_per_fec_group);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(QuicPacketGeneratorPeer);
-};
-
-}  // namespace test
-
-}  // namespace net
-
-#endif  // NET_QUIC_TEST_TOOLS_QUIC_PACKET_GENERATOR_PEER_H_