Use passthrough decoder for (E)AC3 formats

media/filters/android/media_codec_audio_decoder.h

Index: media/filters/android/media_codec_audio_decoder.h
diff --git a/media/filters/android/media_codec_audio_decoder.h b/media/filters/android/media_codec_audio_decoder.h
index 9e08d73807493c4e51e000d25ad47fa48e245b22..91f25f81690b1662ce7370b5185788d1798e430e 100644
--- a/media/filters/android/media_codec_audio_decoder.h
+++ b/media/filters/android/media_codec_audio_decoder.h
@@ -168,6 +168,12 @@ class MEDIA_EXPORT MediaCodecAudioDecoder : public AudioDecoder,
   // Cached decoder config.
   AudioDecoderConfig config_;
 
+  // Indication to use passthrough decoder or not.
+  bool is_passthrough_;
+
+  // The audio sample format of the audio decoder output.
+  SampleFormat sample_format_;
+
   // Actual channel count that comes from decoder may be different than config.
   int channel_count_;
   ChannelLayout channel_layout_;