diff --git a/quic/core/quic_session.h b/quic/core/quic_session.h
index d85f32c..e0f2458 100644
--- a/quic/core/quic_session.h
+++ b/quic/core/quic_session.h
@@ -575,6 +575,10 @@
 
   StreamHandler GetOrCreateStreamImpl(QuicStreamId stream_id, bool may_buffer);
 
+  // Processes the stream type information of |pending| depending on
+  // different kinds of sessions's own rules.
+  virtual void ProcessPendingStreamType(PendingStream* pending) {}
+
   bool eliminate_static_stream_map() const {
     return eliminate_static_stream_map_;
   }