Remove the using_pacing argument from QuicSentPacketManager::SetFromConfig because it's always true.

net/quic/congestion_control/tcp_cubic_sender.h

 // Copyright (c) 2012 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.
 //
 // TCP cubic send side congestion algorithm, emulates the behavior of TCP cubic.
 
 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_
 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_
 
 #include "base/basictypes.h"
@@ skipping 23 matching lines @@
   TcpCubicSender(const QuicClock* clock,
                  const RttStats* rtt_stats,
                  bool reno,
                  QuicPacketCount initial_tcp_congestion_window,
                  QuicPacketCount max_tcp_congestion_window,
                  QuicConnectionStats* stats);
   ~TcpCubicSender() override;
 
   // Start implementation of SendAlgorithmInterface.
   void SetFromConfig(const QuicConfig& config,
-                     Perspective perspective,
-                     bool using_pacing) override;
+                     Perspective perspective) override;
   bool ResumeConnectionState(
       const CachedNetworkParameters& cached_network_params,
       bool max_bandwidth_resumption) override;
   void SetNumEmulatedConnections(int num_connections) override;
   void SetMaxCongestionWindow(QuicByteCount max_congestion_window) override;
   void OnCongestionEvent(bool rtt_updated,
                          QuicByteCount bytes_in_flight,
                          const CongestionVector& acked_packets,
                          const CongestionVector& lost_packets) override;
   bool OnPacketSent(QuicTime sent_time,
@@ skipping 75 matching lines @@
   QuicPacketCount max_tcp_congestion_window_;
 
   const QuicClock* clock_;
 
   DISALLOW_COPY_AND_ASSIGN(TcpCubicSender);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_