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

net/quic/reliable_quic_stream.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 base class for client/server reliable streams.
 
 #ifndef NET_QUIC_RELIABLE_QUIC_STREAM_H_
 #define NET_QUIC_RELIABLE_QUIC_STREAM_H_
 
 #include <sys/types.h>
@@ skipping 209 matching lines @@
   // In combination with fin_sent_, used to ensure that a FIN and/or a RST is
   // always sent before stream termination.
   bool rst_sent_;
 
   // True if this stream has received a RST stream frame.
   bool rst_received_;
 
   // FEC policy to be used for this stream.
   FecPolicy fec_policy_;
 
-  // True if the session this stream is running under is a server session.
-  bool is_server_;
+  // Tracks if the session this stream is running under was created by a
+  // server or a client.
+  Perspective perspective_;
 
   QuicFlowController flow_controller_;
 
   // The connection level flow controller. Not owned.
   QuicFlowController* connection_flow_controller_;
 
   // Special streams, such as the crypto and headers streams, do not respect
   // connection level flow control limits (but are stream level flow control
   // limited).
   bool stream_contributes_to_connection_flow_control_;
 
   DISALLOW_COPY_AND_ASSIGN(ReliableQuicStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_RELIABLE_QUIC_STREAM_H_