VP8FilterStrengthFromDelta  458 third_party/libwebp/enc/filter.c           VP8FilterStrengthFromDelta(enc->filter_hdr_.sharpness_, delta);
VP8FilterStrengthFromDelta  268 third_party/libwebp/enc/quant.c         VP8FilterStrengthFromDelta(enc->filter_hdr_.sharpness_, qstep);
VP8FilterStrengthFromDelta  562 third_party/libwebp/enc/vp8enci.h int VP8FilterStrengthFromDelta(int sharpness, int delta);