Revert chromium patch removing deprecation for av_packet_split_side_data()
This can be handled by setting a AVFormatContext flag of
AVFMT_FLAG_KEEP_SIDE_DATA.
BUG=720142
TEST=media_unittests
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 124dda4..990f8dd 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4687,8 +4687,7 @@
attribute_deprecated
int av_packet_merge_side_data(AVPacket *pkt);
-// Chromium: Avoid calling this. http://crbug.com/720142
-// attribute_deprecated
+attribute_deprecated
int av_packet_split_side_data(AVPacket *pkt);
#endif
