Use ffmpeg for opus decoding, no need to maintain our decoder.

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 144 matching lines @@
     "filters/h264_bit_reader.cc",
     "filters/h264_bit_reader.h",
     "filters/h264_parser.cc",
     "filters/h264_parser.h",
     "filters/ivf_parser.cc",
     "filters/ivf_parser.h",
     "filters/jpeg_parser.cc",
     "filters/jpeg_parser.h",
     "filters/memory_data_source.cc",
     "filters/memory_data_source.h",
-    "filters/opus_audio_decoder.cc",
-    "filters/opus_audio_decoder.h",
     "filters/opus_constants.cc",
     "filters/opus_constants.h",
     "filters/pipeline_controller.cc",
     "filters/pipeline_controller.h",
     "filters/source_buffer_range.cc",
     "filters/source_buffer_range.h",
     "filters/source_buffer_state.cc",
     "filters/source_buffer_state.h",
     "filters/source_buffer_stream.cc",
     "filters/source_buffer_stream.h",
@@ skipping 302 matching lines @@
       "device_monitors/device_monitor_udev.cc",
       "device_monitors/device_monitor_udev.h",
     ]
   }
 
   public_deps += [
     ":media_features",
     ":shared_memory_support",
     "//media/audio",
     "//media/base",
     "//third_party/opus",

[wolenetz, 2016/11/18 00:36:41]

Should this now be conditioned on media_use_ffmpeg?

[DaleCurtis, 2016/11/18 00:51:27]

Probably, I don't know why it's a public dep either, will try moving to normal
deps now.

   ]
 
   deps += [
     "//base",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
     "//crypto",
     "//crypto:platform",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common",
@@ skipping 429 matching lines @@
   fuzzer_test("media_mp4_avcc_parser_fuzzer") {
     sources = [
       "formats/mp4/mp4_avcc_parser_fuzzer.cc",
     ]
     deps = [
       ":media",
       "//base",
     ]
   }
 }