Fix the logic for computing the number of truncated QUIC ACK frames sent.

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 <bitset>
 
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_log.h"
 #include "net/base/network_change_notifier.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_protocol.h"
 
 namespace net {
+namespace test {
+class QuicConnectionLoggerPeer;
+}  // namespace test
 
 class CryptoHandshakeMessage;
 class CertVerifyResult;
 
 // This class is a debug visitor of a QuicConnection which logs
 // events to |net_log|.
 class NET_EXPORT_PRIVATE QuicConnectionLogger
     : public QuicConnectionDebugVisitor {
  public:
   explicit QuicConnectionLogger(const BoundNetLog& net_log);
@@ skipping 47 matching lines @@
   void OnCryptoHandshakeMessageReceived(
       const CryptoHandshakeMessage& message);
   void OnCryptoHandshakeMessageSent(
       const CryptoHandshakeMessage& message);
   void UpdateReceivedFrameCounts(QuicStreamId stream_id,
                                  int num_frames_received,
                                  int num_duplicate_frames_received);
   void OnCertificateVerified(const CertVerifyResult& result);
 
  private:
+  friend class test::QuicConnectionLoggerPeer;
+
   // Do a factory get for a histogram for recording data, about individual
   // packet sequence numbers, that was gathered in the vectors
   // received_packets_ and received_acks_. |statistic_name| identifies which
   // element of data is recorded, and is used to form the histogram name.
   base::HistogramBase* GetPacketSequenceNumberHistogram(
       const char* statistic_name) const;
   // Do a factory get for a histogram to record a 6-packet loss-sequence as a
   // sample. The histogram will record the 64 distinct possible combinations.
   // |which_6| is used to adjust the name of the histogram to distinguish the
   // first 6 packets in a connection, vs. some later 6 packets.
@@ skipping 68 matching lines @@
   // The available type of connection (WiFi, 3G, etc.) when connection was first
   // used.
   const char* const connection_description_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_LOGGER_H_