Support (E)AC3 passthrough

media/mojo/common/media_type_converters.cc

Index: media/mojo/common/media_type_converters.cc
diff --git a/media/mojo/common/media_type_converters.cc b/media/mojo/common/media_type_converters.cc
index 8ca720e10431b4ba1349eef5ecb7eda716ddd98f..9529b095b9daa5e56516bd064e33a52f59560d0c 100644
--- a/media/mojo/common/media_type_converters.cc
+++ b/media/mojo/common/media_type_converters.cc
@@ -304,6 +304,14 @@ TypeConverter<scoped_refptr<media::AudioBuffer>, media::mojom::AudioBufferPtr>::
   if (input->end_of_stream)
     return media::AudioBuffer::CreateEOSBuffer();
 
+  if (input->sample_format == media::kSampleFormatRaw) {
+    uint8_t* data = input->data.data();
+    return media::AudioBuffer::CopyFrom(
+        input->sample_format, input->channel_layout, input->channel_count,
+        input->sample_rate, input->frame_count, &data, input->timestamp,
+        input->data.size());
+  }
+
   // Setup channel pointers.  AudioBuffer::CopyFrom() will only use the first
   // one in the case of interleaved data.
   std::vector<const uint8_t*> channel_ptrs(input->channel_count, nullptr);