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

net/quic/core/quic_packet_generator.cc

Index: net/quic/core/quic_packet_generator.cc
diff --git a/net/quic/core/quic_packet_generator.cc b/net/quic/core/quic_packet_generator.cc
index 7487cde8fa47ded9ea21d04bcbad7b07cbb4f852..be882cee6ab654028b64151bedca7d76b6abb478 100644
--- a/net/quic/core/quic_packet_generator.cc
+++ b/net/quic/core/quic_packet_generator.cc
@@ -353,4 +353,8 @@ bool QuicPacketGenerator::HasRetransmittableFrames() const {
          packet_creator_.HasPendingRetransmittableFrames();
 }
 
+void QuicPacketGenerator::SetDelegateSavesData(bool delegate_saves_data) {
+  packet_creator_.set_delegate_saves_data(delegate_saves_data);
+}
+
 }  // namespace net