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

net/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 1294 matching lines @@
       "quic/core/quic_simple_buffer_allocator.cc",
       "quic/core/quic_simple_buffer_allocator.h",
       "quic/core/quic_socket_address_coder.cc",
       "quic/core/quic_socket_address_coder.h",
       "quic/core/quic_spdy_session.cc",
       "quic/core/quic_spdy_session.h",
       "quic/core/quic_spdy_stream.cc",
       "quic/core/quic_spdy_stream.h",
       "quic/core/quic_stream.cc",
       "quic/core/quic_stream.h",
+      "quic/core/quic_stream_frame_data_producer",
+      "quic/core/quic_stream_send_buffer.cc",
+      "quic/core/quic_stream_send_buffer.h",
       "quic/core/quic_stream_sequencer.cc",
       "quic/core/quic_stream_sequencer.h",
       "quic/core/quic_stream_sequencer_buffer.cc",
       "quic/core/quic_stream_sequencer_buffer.h",
       "quic/core/quic_sustained_bandwidth_recorder.cc",
       "quic/core/quic_sustained_bandwidth_recorder.h",
       "quic/core/quic_tag.cc",
       "quic/core/quic_tag.h",
       "quic/core/quic_time.cc",
       "quic/core/quic_time.h",
@@ skipping 1764 matching lines @@
     "quic/test_tools/quic_stream_sequencer_peer.cc",
     "quic/test_tools/quic_stream_sequencer_peer.h",
     "quic/test_tools/quic_sustained_bandwidth_recorder_peer.cc",
     "quic/test_tools/quic_sustained_bandwidth_recorder_peer.h",
     "quic/test_tools/quic_test_utils.cc",
     "quic/test_tools/quic_test_utils.h",
     "quic/test_tools/quic_time_wait_list_manager_peer.cc",
     "quic/test_tools/quic_time_wait_list_manager_peer.h",
     "quic/test_tools/rtt_stats_peer.cc",
     "quic/test_tools/rtt_stats_peer.h",
+    "quic/test_tools/simple_data_producer.cc",
+    "quic/test_tools/simple_data_producer.h",
     "quic/test_tools/simple_quic_framer.cc",
     "quic/test_tools/simple_quic_framer.h",
     "quic/test_tools/simulator/actor.cc",
     "quic/test_tools/simulator/actor.h",
     "quic/test_tools/simulator/alarm_factory.cc",
     "quic/test_tools/simulator/alarm_factory.h",
     "quic/test_tools/simulator/link.cc",
     "quic/test_tools/simulator/link.h",
     "quic/test_tools/simulator/packet_filter.cc",
     "quic/test_tools/simulator/packet_filter.h",
@@ skipping 1780 matching lines @@
     "quic/core/quic_connection_test.cc",
     "quic/core/quic_crypto_client_stream_test.cc",
     "quic/core/quic_crypto_server_stream_test.cc",
     "quic/core/quic_crypto_stream_test.cc",
     "quic/core/quic_data_writer_test.cc",
     "quic/core/quic_error_codes_test.cc",
     "quic/core/quic_flow_controller_test.cc",
     "quic/core/quic_framer_test.cc",
     "quic/core/quic_header_list_test.cc",
     "quic/core/quic_headers_stream_test.cc",
+    "quic/core/quic_stream_send_buffer_test.cc",
     "quic/test_tools/quic_test_utils_test.cc",
     "quic/test_tools/simulator/quic_endpoint_test.cc",
     "quic/test_tools/simulator/simulator_test.cc",
 
     #    "quic/core/quic_multipath_received_packet_manager_test.cc",
     #    "quic/core/quic_multipath_transmissions_map_test.cc",
     "quic/core/quic_one_block_arena_test.cc",
     "quic/core/quic_packet_creator_test.cc",
     "quic/core/quic_packet_generator_test.cc",
     "quic/core/quic_received_packet_manager_test.cc",
@@ skipping 1128 matching lines @@
   ]
   deps = [
     ":net_fuzzer_test_support",
     ":test_support",
     "//base",
     "//net",
   ]
   dict = "data/fuzzer_dictionaries/net_spdy_session_fuzzer.dict"
   seed_corpus = "data/fuzzer_data/net_spdy_session_fuzzer/"
 }