[Chromecast] Introduce a MediaCapabilitiesShlib::IsSupportedAudioConfig

chromecast/media/cma/backend/cast_media_default.cc

Index: chromecast/media/cma/backend/cast_media_default.cc
diff --git a/chromecast/media/cma/backend/cast_media_default.cc b/chromecast/media/cma/backend/cast_media_default.cc
index 4b92e162e200550345f0eabc1329d2f51dee9618..10755b337695d843c25eecca2da498ad7eb4255d 100644
--- a/chromecast/media/cma/backend/cast_media_default.cc
+++ b/chromecast/media/cma/backend/cast_media_default.cc
@@ -111,5 +111,10 @@ bool MediaCapabilitiesShlib::IsSupportedVideoConfig(VideoCodec codec,
   return (codec == kCodecH264 || codec == kCodecVP8);
 }
 
+bool MediaCapabilitiesShlib::IsSupportedAudioConfig(const AudioConfig& config) {
+  return config.codec == kCodecAAC || config.codec == kCodecMP3 ||
+         config.codec == kCodecPCM;
+}
+
 }  // namespace media
 }  // namespace chromecast