Emit Media Source codec names as media_log events.

media/base/audio_decoder_config.h

Index: media/base/audio_decoder_config.h
diff --git a/media/base/audio_decoder_config.h b/media/base/audio_decoder_config.h
index c8c7b47d23dd795f2a952e8b45db5b81eb211223..3bfde32b193b2ccacf1856ba63ea73ded99b8cfb 100644
--- a/media/base/audio_decoder_config.h
+++ b/media/base/audio_decoder_config.h
@@ -45,6 +45,8 @@ enum AudioCodec {
   kAudioCodecMax = kCodecPCM_ALAW,
 };
 
+const char* AudioCodecName(AudioCodec audio_codec, SampleFormat sample_format);

[DaleCurtis, 2014/11/19 00:01:56]

Instead of adding it like this, how about having a
AudioDecoderConfig::GetHumanReadableCodecName() function? The
AsHumanReadableString() method can then use this method too for better logs.

I'd also return std::string like that method too.

[watk, 2014/11/19 19:18:09]

Done.

+
 // TODO(dalecurtis): FFmpeg API uses |bytes_per_channel| instead of
 // |bits_per_channel|, we should switch over since bits are generally confusing
 // to work with.