Support (E)AC3 passthrough

media/base/mime_util_internal.cc

Index: media/base/mime_util_internal.cc
diff --git a/media/base/mime_util_internal.cc b/media/base/mime_util_internal.cc
index 11a763e74ab3c0054e6a39db8a3bcdbac462b19b..8e65534643d91cea5185cdf2474e3542add77ff3 100644
--- a/media/base/mime_util_internal.cc
+++ b/media/base/mime_util_internal.cc
@@ -553,8 +553,6 @@ bool MimeUtil::IsCodecSupportedOnPlatform(
     // The following codecs are never supported.
     // ----------------------------------------------------------------------
     case INVALID_CODEC:
-    case AC3:
-    case EAC3:
     case THEORA:
       return false;
 
@@ -655,6 +653,14 @@ bool MimeUtil::IsCodecSupportedOnPlatform(
       // MediaPlayer only supports VP9 in WebM.
       return mime_type_lower_case == "video/webm";
     }
+
+    case AC3:
+    case EAC3:
+#if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
+      return true;
+#else
+      return false;
+#endif
   }
 
   return false;