Create a Perspective enum to use instead of a bool is_server to improve

net/quic/congestion_control/send_algorithm_interface.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.
 //
 // The pure virtual class for send side congestion control algorithm.
 
 #ifndef NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_
 #define NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_
 
 #include <algorithm>
@@ skipping 21 matching lines @@
 
   static SendAlgorithmInterface* Create(
       const QuicClock* clock,
       const RttStats* rtt_stats,
       CongestionControlType type,
       QuicConnectionStats* stats,
       QuicPacketCount initial_congestion_window);
 
   virtual ~SendAlgorithmInterface() {}
 
-  virtual void SetFromConfig(
-      const QuicConfig& config, bool is_server, bool using_pacing) = 0;
+  virtual void SetFromConfig(const QuicConfig& config,
+                             Perspective perspective,
+                             bool using_pacing) = 0;
 
   // Sets the number of connections to emulate when doing congestion control,
   // particularly for congestion avoidance.  Can be set any time.
   virtual void SetNumEmulatedConnections(int num_connections) = 0;
 
   // Indicates an update to the congestion state, caused either by an incoming
   // ack or loss event timeout.  |rtt_updated| indicates whether a new
   // latest_rtt sample has been taken, |byte_in_flight| the bytes in flight
   // prior to the congestion event.  |acked_packets| and |lost_packets| are
   // any packets considered acked or lost as a result of the congestion event.
@@ skipping 60 matching lines @@
 
   // Called by the Session when we get a bandwidth estimate from the client.
   // Returns true if initial connection state is changed as a result.
   virtual bool ResumeConnectionState(
       const CachedNetworkParameters& cached_network_params) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_