Use QuicSession::transport_version() instead of QuicConnection::transport_version() to make code cleaner.

gfe-relnote: code cleanup, not protected.
PiperOrigin-RevId: 267628510
Change-Id: I2b28c42ec2345870905e7e5d7e88721be86ad6e4
diff --git a/quic/core/quic_stream.cc b/quic/core/quic_stream.cc
index eb8b96b..c08688b 100644
--- a/quic/core/quic_stream.cc
+++ b/quic/core/quic_stream.cc
@@ -270,8 +270,7 @@
       buffered_data_threshold_(GetQuicFlag(FLAGS_quic_buffered_data_threshold)),
       is_static_(is_static),
       deadline_(QuicTime::Zero()),
-      type_(VersionHasIetfQuicFrames(
-                session->connection()->transport_version()) &&
+      type_(VersionHasIetfQuicFrames(session->transport_version()) &&
                     type != CRYPTO
                 ? QuicUtils::GetStreamType(id_,
                                            perspective_,
@@ -701,7 +700,7 @@
 }
 
 QuicTransportVersion QuicStream::transport_version() const {
-  return session_->connection()->transport_version();
+  return session_->transport_version();
 }
 
 HandshakeProtocol QuicStream::handshake_protocol() const {