Support (E)AC3 passthrough

media/base/media_client.h

Index: media/base/media_client.h
diff --git a/media/base/media_client.h b/media/base/media_client.h
index e3bb095a6ac83077bb5b7213fdff6b8392926600..f5548b781a295ef53e00a5c6a2391219edd81831 100644
--- a/media/base/media_client.h
+++ b/media/base/media_client.h
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "media/base/audio_codecs.h"
 #include "media/base/key_system_properties.h"
 #include "media/base/media_export.h"
 #include "media/base/video_codecs.h"
@@ -71,6 +72,10 @@ class MEDIA_EXPORT MediaClient {
   virtual bool IsSupportedVideoConfig(VideoCodec codec,
                                       VideoCodecProfile profile,
                                       int level) = 0;
+
+  // Returns true if the compressed audio |codec| format is supported by the
+  // audio sink.
+  virtual bool IsPassthroughAudioSupported(AudioCodec codec) = 0;
 };
 
 }  // namespace media