Use passthrough decoder for (E)AC3 formats

media/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/buildflag_header.gni")
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/features.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
@@ skipping 183 matching lines @@
     "filters/vp9_compressed_header_parser.h",
     "filters/vp9_parser.cc",
     "filters/vp9_parser.h",
     "filters/vp9_raw_bits_reader.cc",
     "filters/vp9_raw_bits_reader.h",
     "filters/vp9_uncompressed_header_parser.cc",
     "filters/vp9_uncompressed_header_parser.h",
     "filters/webvtt_util.h",
     "filters/wsola_internals.cc",
     "filters/wsola_internals.h",
+    "formats/ac3/ac3_util.cc",
+    "formats/ac3/ac3_util.h",
     "formats/common/offset_byte_queue.cc",
     "formats/common/offset_byte_queue.h",
     "formats/webm/webm_audio_client.cc",
     "formats/webm/webm_audio_client.h",
     "formats/webm/webm_cluster_parser.cc",
     "formats/webm/webm_cluster_parser.h",
     "formats/webm/webm_colour_parser.cc",
     "formats/webm/webm_colour_parser.h",
     "formats/webm/webm_constants.cc",
     "formats/webm/webm_constants.h",
@@ skipping 368 matching lines @@
     "filters/source_buffer_state_unittest.cc",
     "filters/source_buffer_stream_unittest.cc",
     "filters/video_cadence_estimator_unittest.cc",
     "filters/video_decoder_selector_unittest.cc",
     "filters/video_frame_stream_unittest.cc",
     "filters/video_renderer_algorithm_unittest.cc",
     "filters/vp8_bool_decoder_unittest.cc",
     "filters/vp8_parser_unittest.cc",
     "filters/vp9_parser_unittest.cc",
     "filters/vp9_raw_bits_reader_unittest.cc",
+    "formats/ac3/ac3_util_unittest.cc",
     "formats/common/offset_byte_queue_unittest.cc",
     "formats/webm/cluster_builder.cc",
     "formats/webm/cluster_builder.h",
     "formats/webm/opus_packet_builder.cc",
     "formats/webm/opus_packet_builder.h",
     "formats/webm/tracks_builder.cc",
     "formats/webm/tracks_builder.h",
     "formats/webm/webm_cluster_parser_unittest.cc",
     "formats/webm/webm_content_encodings_client_unittest.cc",
     "formats/webm/webm_crypto_helpers_unittest.cc",
@@ skipping 394 matching lines @@
   fuzzer_test("media_mp4_avcc_parser_fuzzer") {
     sources = [
       "formats/mp4/mp4_avcc_parser_fuzzer.cc",
     ]
     deps = [
       ":media",
       "//base",
     ]
   }
 }