Consider pending streams in ShouldKeepConnectionAlive.

gfe-relnote: protected by disabled v99 flag.
PiperOrigin-RevId: 276140643
Change-Id: Ie7d8c35ab325998ecbd1856927db665f611e051d
diff --git a/quic/core/quic_session.h b/quic/core/quic_session.h
index 498fb57..d221fe6 100644
--- a/quic/core/quic_session.h
+++ b/quic/core/quic_session.h
@@ -538,6 +538,10 @@
   StreamMap& stream_map() { return stream_map_; }
   const StreamMap& stream_map() const { return stream_map_; }
 
+  const PendingStreamMap& pending_streams() const {
+    return pending_stream_map_;
+  }
+
   ClosedStreams* closed_streams() { return &closed_streams_; }
 
   const ZombieStreamMap& zombie_streams() const { return zombie_streams_; }