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

net/quic/quic_sent_packet_manager.h

 // Copyright 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_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 75 matching lines @@
               retransmittable_frames(retransmittable_frames),
               sequence_number_length(sequence_number_length) {
         }
 
         QuicPacketSequenceNumber sequence_number;
         TransmissionType transmission_type;
         const RetransmittableFrames& retransmittable_frames;
         QuicSequenceNumberLength sequence_number_length;
   };
 
-  QuicSentPacketManager(bool is_server,
+  QuicSentPacketManager(Perspective perspective,
                         const QuicClock* clock,
                         QuicConnectionStats* stats,
                         CongestionControlType congestion_control_type,
                         LossDetectionType loss_type,
                         bool is_secure);
   virtual ~QuicSentPacketManager();
 
   virtual void SetFromConfig(const QuicConfig& config);
 
   // Pass the CachedNetworkParameters to the send algorithm.
@@ skipping 238 matching lines @@
   // packet. The old packet's retransmittable frames entry will be nullptr,
   // while the new packet's entry will contain the frames to retransmit.
   // If the old packet is acked before the new packet, then the old entry will
   // be removed from the map and the new entry's retransmittable frames will be
   // set to nullptr.
   QuicUnackedPacketMap unacked_packets_;
 
   // Pending retransmissions which have not been packetized and sent yet.
   PendingRetransmissionMap pending_retransmissions_;
 
-  // Tracks if the connection was created by the server.
-  bool is_server_;
+  // Tracks if the connection was created by the server or the client.
+  Perspective perspective_;
 
   // An AckNotifier can register to be informed when ACKs have been received for
   // all packets that a given block of data was sent in. The AckNotifierManager
   // maintains the currently active notifiers.
   AckNotifierManager ack_notifier_manager_;
 
   const QuicClock* clock_;
   QuicConnectionStats* stats_;
   DebugDelegate* debug_delegate_;
   NetworkChangeVisitor* network_change_visitor_;
@@ skipping 40 matching lines @@
   // Records bandwidth from server to client in normal operation, over periods
   // of time with no loss events.
   QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_