Remove obsolete QUIC disabling code.

net/quic/chromium/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 66 matching lines @@
   void OnSuccessfulVersionNegotiation(const QuicVersion& version) override;
   void OnRttChanged(QuicTime::Delta rtt) const override;
 
   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);
 
-  // Returns connection's overall packet loss rate in fraction.

[Buck, 2016/09/07 22:54:16]

Not a big deal, but not obvious to me why only removing the comment here.

[Ryan Hamilton, 2016/09/07 23:02:37]

Thanks. I added it back. I accidentally removed it when I thought I could remove
this whole method. When I realized that I couldn't, I apparently forgot to
restore the comment.

   float ReceivedPacketLossRate() const;
 
  private:
   // 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.
   base::HistogramBase* Get6PacketHistogram(const char* which_6) const;
   // For connections longer than 21 received packets, this call will calculate
   // the overall packet loss rate, and record it into a histogram.
@@ skipping 57 matching lines @@
   // Receives notifications regarding the performance of the underlying socket
   // for the QUIC connection. May be null.
   const std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_LOGGER_H_