Re-add AC3/EAC3 audio demuxing support

media/base/audio_decoder_config.cc

 // Copyright (c) 2012 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.
 
 #include "media/base/audio_decoder_config.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "media/audio/sample_rates.h"
@@ skipping 110 matching lines @@
   return s.str();
 }
 
 // These names come from src/third_party/ffmpeg/libavcodec/codec_desc.c
 std::string AudioDecoderConfig::GetHumanReadableCodecName() const {
   switch (codec()) {
     case kUnknownAudioCodec:
       return "unknown";
     case kCodecAAC:
       return "aac";
+    case kCodecAC3:
+      return "ac3";
+    case kCodecEAC3:
+      return "eac3";
     case kCodecMP3:
       return "mp3";
     case kCodecPCM:
     case kCodecPCM_S16BE:
     case kCodecPCM_S24BE:
       return "pcm";
     case kCodecVorbis:
       return "vorbis";
     case kCodecFLAC:
       return "flac";
     case kCodecAMR_NB:
       return "amr_nb";
     case kCodecAMR_WB:
       return "amr_wb";
     case kCodecGSM_MS:
       return "gsm_ms";
     case kCodecPCM_ALAW:
       return "pcm_alaw";
     case kCodecPCM_MULAW:
       return "pcm_mulaw";
     case kCodecOpus:
       return "opus";
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace media