Add a version() convenience method to ReliableQuicStream.

net/quic/reliable_quic_stream.cc

Index: net/quic/reliable_quic_stream.cc
diff --git a/net/quic/reliable_quic_stream.cc b/net/quic/reliable_quic_stream.cc
index 1db53573efdfe5639c24b9764a9ff716c26b335e..5d9c3cce49c92e7b0952e4faa6a7bc196168de86 100644
--- a/net/quic/reliable_quic_stream.cc
+++ b/net/quic/reliable_quic_stream.cc
@@ -112,6 +112,10 @@ void ReliableQuicStream::CloseConnectionWithDetails(QuicErrorCode error,
   session()->connection()->SendConnectionCloseWithDetails(error, details);
 }
 
+QuicVersion ReliableQuicStream::version() {
+  return session()->connection()->version();
+}
+
 void ReliableQuicStream::WriteOrBufferData(StringPiece data, bool fin) {
   DCHECK(data.size() > 0 || fin);
   DCHECK(!fin_buffered_);