WebPMultRow       419 third_party/libwebp/enc/picture.c       WebPMultRow(ptr_y, ptr_a, pic->width, inverse);
WebPMultRow       187 third_party/libwebp/utils/alpha_processing.c     WebPMultRow(ptr, alpha, width, inverse);
WebPMultRow        34 third_party/libwebp/utils/alpha_processing.h void WebPMultRow(uint8_t* const ptr, const uint8_t* const alpha,