Use passthrough decoder for (E)AC3 formats

media/base/android/media_codec_util.h

Index: media/base/android/media_codec_util.h
diff --git a/media/base/android/media_codec_util.h b/media/base/android/media_codec_util.h
index 7aba8e537fe87bc4eca7ea2380e9821e688a4373..4b122e3ddbec735baee580e1aea1e8640e0b89e9 100644
--- a/media/base/android/media_codec_util.h
+++ b/media/base/android/media_codec_util.h
@@ -84,6 +84,10 @@ class MEDIA_EXPORT MediaCodecUtil {
   // Indicates if MediaCodec.setOutputSurface() works on this device.
   static bool IsSetOutputSurfaceSupported();
 
+  // Return true if the compressed audio |codec| will pass through the media
+  // pipelines without decompression.
+  static bool IsPassthroughAudioFormat(AudioCodec codec);
+
   // Indicates if the decoder is known to fail when flushed. (b/8125974,
   // b/8347958)
   // When true, the client should work around the issue by releasing the