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

net/quic/congestion_control/pacing_sender.cc

Index: net/quic/congestion_control/pacing_sender.cc
diff --git a/net/quic/congestion_control/pacing_sender.cc b/net/quic/congestion_control/pacing_sender.cc
index 3df555ff81fe9f34284e119a75e44b94c60a9880..addf426b5fe10a91194f8f162ea2cbbf47ffd860 100644
--- a/net/quic/congestion_control/pacing_sender.cc
+++ b/net/quic/congestion_control/pacing_sender.cc
@@ -21,10 +21,10 @@ PacingSender::PacingSender(SendAlgorithmInterface* sender,
 PacingSender::~PacingSender() {}
 
 void PacingSender::SetFromConfig(const QuicConfig& config,
-                                 bool is_server,
+                                 Perspective perspective,
                                  bool using_pacing) {
   DCHECK(using_pacing);
-  sender_->SetFromConfig(config, is_server, using_pacing);
+  sender_->SetFromConfig(config, perspective, using_pacing);
 }
 
 bool PacingSender::ResumeConnectionState(