Add directionality check for OnCanCreateNewOutgoingStream().

QuicSimpleServerSession only creates unidirectional push streams, and grpc sessions only create bidirectional streams.

gfe-relnote: Change is not used in prod, not protected.
PiperOrigin-RevId: 258999547
Change-Id: Id2334dba63dc94179f8403ef9207799f2a147e3a
diff --git a/quic/tools/quic_simple_server_session.cc b/quic/tools/quic_simple_server_session.cc
index ad59527..2e98cdd 100644
--- a/quic/tools/quic_simple_server_session.cc
+++ b/quic/tools/quic_simple_server_session.cc
@@ -227,7 +227,9 @@
 }
 
 void QuicSimpleServerSession::OnCanCreateNewOutgoingStream(
-    bool /*unidirectional*/) {
-  HandlePromisedPushRequests();
+    bool unidirectional) {
+  if (unidirectional) {
+    HandlePromisedPushRequests();
+  }
 }
 }  // namespace quic