Start using the loss timeout in QuicSentPacketManager and add a mock

net/quic/test_tools/quic_sent_packet_manager_peer.h

 // Copyright 2013 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_SENT_PACKET_MANAGER_PEER_H_
 #define NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_
 
 #include "net/quic/quic_protocol.h"
 #include "net/quic/quic_sent_packet_manager.h"
 
 namespace net {
 
 class SendAlgorithmInterface;
 
 namespace test {
 
 class QuicSentPacketManagerPeer {
  public:
   static void SetMaxTailLossProbes(
       QuicSentPacketManager* sent_packet_manager, size_t max_tail_loss_probes);
 
   static void SetSendAlgorithm(QuicSentPacketManager* sent_packet_manager,
                                SendAlgorithmInterface* send_algorithm);
 
+  static void SetLossAlgorithm(QuicSentPacketManager* sent_packet_manager,
+                               LossDetectionInterface* loss_detector);
+
   static size_t GetNackCount(
       const QuicSentPacketManager* sent_packet_manager,
       QuicPacketSequenceNumber sequence_number);
 
   static size_t GetPendingRetransmissionCount(
       const QuicSentPacketManager* sent_packet_manager);
 
   static bool HasPendingPackets(
       const QuicSentPacketManager* sent_packet_manager);
 
@@ skipping 24 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManagerPeer);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_