IsValidExtendedFormat   92 third_party/libwebp/demux/demux.c static int IsValidExtendedFormat(const WebPDemuxer* const dmux);
IsValidExtendedFormat   97 third_party/libwebp/demux/demux.c   { { 'V', 'P', '8', 'X' }, ParseVP8X,        IsValidExtendedFormat },