Refactor of QUIC's rtt storage and calculation to have a single RttStats

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 RttStats* GetRttStats(QuicSentPacketManager* sent_packet_manager);
+
   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);
 
   static QuicTime GetSentTime(const QuicSentPacketManager* sent_packet_manager,
                               QuicPacketSequenceNumber sequence_number);
 
-  static QuicTime::Delta rtt(QuicSentPacketManager* sent_packet_manager);
-
   // Returns true if |sequence_number| is a retransmission of a packet.
   static bool IsRetransmission(QuicSentPacketManager* sent_packet_manager,
                                QuicPacketSequenceNumber sequence_number);
 
   static void MarkForRetransmission(QuicSentPacketManager* sent_packet_manager,
                                     QuicPacketSequenceNumber sequence_number,
                                     TransmissionType transmission_type);
 
   static QuicTime::Delta GetRetransmissionDelay(
       const QuicSentPacketManager* sent_packet_manager);
 
   static bool HasUnackedCryptoPackets(
       const QuicSentPacketManager* sent_packet_manager);
 
   static size_t GetNumRetransmittablePackets(
       const QuicSentPacketManager* sent_packet_manager);
 
   static SequenceNumberSet GetUnackedPackets(
       const QuicSentPacketManager* sent_packet_manager);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManagerPeer);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_