Pass more detailed audio hardware configuration information to the renderer

media/ffmpeg/ffmpeg_common.cc

Index: media/ffmpeg/ffmpeg_common.cc
===================================================================
--- media/ffmpeg/ffmpeg_common.cc	(revision 187053)
+++ media/ffmpeg/ffmpeg_common.cc	(working copy)
@@ -269,32 +269,6 @@
   return AV_SAMPLE_FMT_NONE;
 }
 
-// Converts a channel count into a channel layout.  Layouts chosen based on the
-// Vorbis / Opus channel layout.
-static ChannelLayout GuessChannelLayout(int channels) {
-  switch (channels) {
-    case 1:
-      return CHANNEL_LAYOUT_MONO;
-    case 2:
-      return CHANNEL_LAYOUT_STEREO;
-    case 3:
-      return CHANNEL_LAYOUT_SURROUND;
-    case 4:
-      return CHANNEL_LAYOUT_QUAD;
-    case 5:
-      return CHANNEL_LAYOUT_5_0;
-    case 6:
-      return CHANNEL_LAYOUT_5_1;
-    case 7:
-      return CHANNEL_LAYOUT_6_1;
-    case 8:
-      return CHANNEL_LAYOUT_7_1;
-    default:
-      DVLOG(1) << "Unsupported channel count: " << channels;
-  }
-  return CHANNEL_LAYOUT_UNSUPPORTED;
-}
-
 void AVCodecContextToAudioDecoderConfig(
     const AVCodecContext* codec_context,
     AudioDecoderConfig* config) {