Add an option to disable net::BidirectionalStreamQuicImpl

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index 30cec77f04d48d0ec4aad019a6abd4dece195f9b..aa0dcb97dfb41ed61153b9224ef53a36bda69924 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -185,6 +185,10 @@ class NET_EXPORT HttpNetworkSession
     // If true, active QUIC sessions experiencing poor connectivity may be
     // migrated onto a new network.
     bool quic_migrate_sessions_early;
+    // If true, net::BidirectionalStreamQuicImpl will not be used when
+    // requesting a net::BidirectionalStream.
+    bool disable_bidirectional_stream_quic_impl;
+
     ProxyDelegate* proxy_delegate;
     // Enable support for Token Binding.
     bool enable_token_binding;