Allow congestion controller state to be accessed by the debug visitors.

net/quic/core/quic_sent_packet_manager.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_QUIC_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 190 matching lines @@
   void SetNetworkChangeVisitor(NetworkChangeVisitor* visitor) override;
 
   bool InSlowStart() const override;
 
   size_t GetConsecutiveRtoCount() const override;
 
   size_t GetConsecutiveTlpCount() const override;
 
   void OnApplicationLimited() override;
 
+  const SendAlgorithmInterface* GetSendAlgorithm() const override;
+
  private:
   friend class test::QuicConnectionPeer;
   friend class test::QuicSentPacketManagerPeer;
 
   // The retransmission timer is a single timer which switches modes depending
   // upon connection state.
   enum RetransmissionTimeoutMode {
     // A conventional TCP style RTO.
     RTO_MODE,
     // A tail loss probe.  By default, QUIC sends up to two before RTOing.
@@ skipping 194 matching lines @@
   // Records bandwidth from server to client in normal operation, over periods
   // of time with no loss events.
   QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_