In QUIC, send data is copied to streams rather than frames. Protected by FLAGS_quic_reloadable_flag…

net/quic/core/quic_connection.cc

Index: net/quic/core/quic_connection.cc
diff --git a/net/quic/core/quic_connection.cc b/net/quic/core/quic_connection.cc
index 26f097d85d69e601776087f45da637b628d479ec..4f6c8898b5edd64d68ffd0ba3411225dcdc40938 100644
--- a/net/quic/core/quic_connection.cc
+++ b/net/quic/core/quic_connection.cc
@@ -2441,4 +2441,23 @@ void QuicConnection::SetStreamNotifier(
   sent_packet_manager_.SetStreamNotifier(stream_notifier);
 }
 
+void QuicConnection::SetDelegateSavesData(bool delegate_saves_data) {
+  packet_generator_.SetDelegateSavesData(delegate_saves_data);
+}
+
+void QuicConnection::SaveStreamData(QuicStreamId id,
+                                    QuicIOVector iov,
+                                    size_t iov_offset,
+                                    QuicStreamOffset offset,
+                                    QuicByteCount data_length) {
+  visitor_->SaveStreamData(id, iov, iov_offset, offset, data_length);
+}
+
+bool QuicConnection::WriteStreamData(QuicStreamId id,
+                                     QuicStreamOffset offset,
+                                     QuicByteCount data_length,
+                                     QuicDataWriter* writer) {
+  return visitor_->WriteStreamData(id, offset, data_length, writer);
+}
+
 }  // namespace net