Ensure that BidirectionalStreamQuicImpl does not synchronously invoke callbacks

net/quic/chromium/bidirectional_stream_quic_impl.h

Index: net/quic/chromium/bidirectional_stream_quic_impl.h
diff --git a/net/quic/chromium/bidirectional_stream_quic_impl.h b/net/quic/chromium/bidirectional_stream_quic_impl.h
index f2a405527cb6a19678d292389b2338b3c530ccd8..1b3864661fd14666f77fc486d98be40c07cb560b 100644
--- a/net/quic/chromium/bidirectional_stream_quic_impl.h
+++ b/net/quic/chromium/bidirectional_stream_quic_impl.h
@@ -131,6 +131,9 @@ class NET_EXPORT_PRIVATE BidirectionalStreamQuicImpl
   // frame with data frame in the same packet if possible.
   bool send_request_headers_automatically_;
 
+  // True when callbacks to the delegate may be invoked synchronously.
+  bool may_invoke_callbacks_;
+
   base::WeakPtrFactory<BidirectionalStreamQuicImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BidirectionalStreamQuicImpl);