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

net/quic/core/frames/quic_stream_frame.cc

 // Copyright (c) 2016 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/core/frames/quic_stream_frame.h"
 
 #include "net/quic/platform/api/quic_logging.h"
 
 namespace net {
 
@@ skipping 34 matching lines @@
                       nullptr,
                       data_length,
                       std::move(buffer)) {
   DCHECK(this->buffer != nullptr);
   DCHECK_EQ(data_buffer, this->buffer.get());
 }
 
 QuicStreamFrame::QuicStreamFrame(QuicStreamId stream_id,
                                  bool fin,
                                  QuicStreamOffset offset,
+                                 QuicPacketLength data_length)
+    : QuicStreamFrame(stream_id, fin, offset, nullptr, data_length, nullptr) {}
+
+QuicStreamFrame::QuicStreamFrame(QuicStreamId stream_id,
+                                 bool fin,
+                                 QuicStreamOffset offset,
                                  const char* data_buffer,
                                  QuicPacketLength data_length,
                                  UniqueStreamBuffer buffer)
     : stream_id(stream_id),
       fin(fin),
       data_length(data_length),
       data_buffer(data_buffer),
       offset(offset),
       buffer(std::move(buffer)) {
   if (this->buffer != nullptr) {
     DCHECK(data_buffer == nullptr);
     this->data_buffer = this->buffer.get();
   }
 }
 
 QuicStreamFrame::~QuicStreamFrame() {}
 
 std::ostream& operator<<(std::ostream& os,
                          const QuicStreamFrame& stream_frame) {
   os << "{ stream_id: " << stream_frame.stream_id
      << ", fin: " << stream_frame.fin << ", offset: " << stream_frame.offset
      << ", length: " << stream_frame.data_length << " }\n";
   return os;
 }
 
 }  // namespace net