Chromecast: Use std::vector to pass video config in CMA

chromecast/media/cma/pipeline/audio_pipeline_impl.cc

Index: chromecast/media/cma/pipeline/audio_pipeline_impl.cc
diff --git a/chromecast/media/cma/pipeline/audio_pipeline_impl.cc b/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
index 82b56e25973ab5df2cf10edad30ddd43495bc444..045281901ae340ad2896b3bcc8aa0a413e567116 100644
--- a/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
+++ b/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
@@ -127,6 +127,7 @@ void AudioPipelineImpl::OnUpdateConfig(
     StreamId id,
     const ::media::AudioDecoderConfig& audio_config,
     const ::media::VideoDecoderConfig& video_config) {
+  DCHECK(!video_config.IsValidConfig());
   if (audio_config.IsValidConfig()) {
     CMALOG(kLogControl) << "AudioPipelineImpl::OnUpdateConfig id:" << id << " "
                         << audio_config.AsHumanReadableString();