Expose packet loss counts from QUIC to NetworkQualityEstimator

net/quic/quic_connection_logger.h

 // Copyright (c) 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_CONNECTION_LOGGER_H_
 #define NET_QUIC_QUIC_CONNECTION_LOGGER_H_
 
 #include <stddef.h>
 
 #include <bitset>
@@ skipping 105 matching lines @@
   static void AddTo21CumulativeHistogram(base::HistogramBase* histogram,
                                          int bit_mask_of_packets,
                                          int valid_bits_in_mask);
   // For connections longer than 21 received packets, this call will calculate
   // the overall packet loss rate, and record it into a histogram.
   void RecordAggregatePacketLossRate() const;
   // At destruction time, this records results of |pacaket_received_| into
   // histograms for specific connection types.
   void RecordLossHistograms() const;
 
+  // Reports the counts of the packets received on the uplink (remote endpoint

[bengr, 2016/02/19 00:45:09]

I think you just mean "reports packet receptions to the
|socket_performance_watcher_|."

Where do packet numbers come from?

[tbansal1, 2016/02/26 01:15:00]

Done.

+  // to this device) to the |socket_performance_watcher_|. Called everytime a
+  // packet is received. |previous_largest_received_packet_number| is the value
+  // of |largest_received_packet_number_| before the packet was received.
+  void ReportPacketCounts(
+      QuicPacketCount previous_largest_received_packet_number) const;
+
   BoundNetLog net_log_;
   QuicSpdySession* session_;  // Unowned.
   // The last packet number received.
   QuicPacketNumber last_received_packet_number_;
   // The size of the most recently received packet.
   size_t last_received_packet_size_;
   // The size of the previously received packet.
   size_t previous_received_packet_size_;
   // The timestamp of last packet sent.
   QuicTime last_packet_sent_time_;
@@ skipping 51 matching lines @@
   // Receives notifications regarding the performance of the underlying socket
   // for the QUIC connection. May be null.
   const scoped_ptr<SocketPerformanceWatcher> socket_performance_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_LOGGER_H_