Introduce media::AudioPushFifo and a couple of use cases (and clean-ups).

media/base/BUILD.gn

 # Copyright 2014 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/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
@@ skipping 21 matching lines @@
     "audio_discard_helper.cc",
     "audio_discard_helper.h",
     "audio_fifo.cc",
     "audio_fifo.h",
     "audio_hardware_config.cc",
     "audio_hardware_config.h",
     "audio_hash.cc",
     "audio_hash.h",
     "audio_pull_fifo.cc",
     "audio_pull_fifo.h",
+    "audio_push_fifo.cc",
+    "audio_push_fifo.h",
     "audio_renderer.cc",
     "audio_renderer.h",
     "audio_renderer_mixer.cc",
     "audio_renderer_mixer.h",
     "audio_renderer_mixer_input.cc",
     "audio_renderer_mixer_input.h",
     "audio_renderer_sink.h",
     "audio_shifter.cc",
     "audio_shifter.h",
     "audio_splicer.cc",
@@ skipping 322 matching lines @@
     "audio_buffer_converter_unittest.cc",
     "audio_buffer_queue_unittest.cc",
     "audio_buffer_unittest.cc",
     "audio_bus_unittest.cc",
     "audio_converter_unittest.cc",
     "audio_discard_helper_unittest.cc",
     "audio_fifo_unittest.cc",
     "audio_hardware_config_unittest.cc",
     "audio_hash_unittest.cc",
     "audio_pull_fifo_unittest.cc",
+    "audio_push_fifo_unittest.cc",
     "audio_renderer_mixer_input_unittest.cc",
     "audio_renderer_mixer_unittest.cc",
     "audio_shifter_unittest.cc",
     "audio_splicer_unittest.cc",
     "audio_timestamp_helper_unittest.cc",
     "bind_to_current_loop_unittest.cc",
     "bit_reader_unittest.cc",
     "callback_holder.h",
     "callback_holder_unittest.cc",
     "channel_mixer_unittest.cc",
@@ skipping 152 matching lines @@
 }
 
 fuzzer_test("media_container_names_fuzzer") {
   sources = [
     "container_names_fuzzertest.cc",
   ]
   deps = [
     "//media",
   ]
 }