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

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
diff --git a/net/quic/quic_protocol.cc b/net/quic/quic_protocol.cc
index 6cd3ae955a2077d70c3c9f8258e70300f2cd6764..a034cfba7e35bf09b7337010842e1625e914775b 100644
--- a/net/quic/quic_protocol.cc
+++ b/net/quic/quic_protocol.cc
@@ -199,6 +199,15 @@ string QuicVersionVectorToString(const QuicVersionVector& versions) {
   return result;
 }
 
+ostream& operator<<(ostream& os, const Perspective& s) {
+  if (s == Perspective::IS_SERVER) {
+    os << "IS_SERVER";
+  } else {
+    os << "IS_CLIENT";
+  }
+  return os;
+}
+
 ostream& operator<<(ostream& os, const QuicPacketHeader& header) {
   os << "{ connection_id: " << header.public_header.connection_id
      << ", connection_id_length:" << header.public_header.connection_id_length