Use passthrough decoder for (E)AC3 formats

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 23 matching lines @@
     "//media",
 
     # TODO(xhwang): Clean up the dependency graph within "media" target.
     "//media/audio",
     "//media/ffmpeg",
 
     # TODO(xhwang): Remove this dependency.
     "//media/capture",
   ]
   sources = [
+    "ac3_util.cc",
+    "ac3_util.h",
     "audio_block_fifo.cc",
     "audio_block_fifo.h",
     "audio_buffer.cc",
     "audio_buffer.h",
     "audio_buffer_converter.cc",
     "audio_buffer_converter.h",
     "audio_buffer_queue.cc",
     "audio_buffer_queue.h",
     "audio_capturer_source.h",
     "audio_codecs.cc",
@@ skipping 562 matching lines @@
 
 fuzzer_test("media_container_names_fuzzer") {
   sources = [
     "container_names_fuzzertest.cc",
   ]
   deps = [
     "//base",
     "//media",
   ]
 }