FILTER_TRY_NONE   207 third_party/libwebp/enc/alpha.c       bit_map |= FILTER_TRY_NONE;
FILTER_TRY_NONE   210 third_party/libwebp/enc/alpha.c     bit_map = FILTER_TRY_NONE;
FILTER_TRY_NONE   233 third_party/libwebp/enc/alpha.c   if (try_map != FILTER_TRY_NONE) {