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

net/quic/test_tools/simple_data_producer.cc

+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/test_tools/simple_data_producer.h"
+
+#include "net/quic/platform/api/quic_map_util.h"
+
+namespace net {
+
+namespace test {
+
+SimpleDataProducer::SimpleDataProducer() {}
+
+SimpleDataProducer::~SimpleDataProducer() {}
+
+void SimpleDataProducer::SaveStreamData(QuicStreamId id,
+                                        QuicIOVector iov,
+                                        size_t iov_offset,
+                                        QuicStreamOffset offset,
+                                        QuicByteCount data_length) {
+  if (!QuicContainsKey(send_buffer_map_, id)) {
+    send_buffer_map_[id].reset(new QuicStreamSendBuffer(&allocator_));
+  }
+  send_buffer_map_[id]->SaveStreamData(iov, iov_offset, offset, data_length);
+}
+
+bool SimpleDataProducer::WriteStreamData(QuicStreamId id,
+                                         QuicStreamOffset offset,
+                                         QuicByteCount data_length,
+                                         QuicDataWriter* writer) {
+  return send_buffer_map_[id]->WriteStreamData(offset, data_length, writer);
+}
+
+}  // namespace test
+
+}  // namespace net