ReconstructUV    1017 third_party/libwebp/enc/quant.c     rd_uv.nz = ReconstructUV(it, &rd_uv, tmp_dst, mode);
ReconstructUV    1063 third_party/libwebp/enc/quant.c   nz |= ReconstructUV(it, rd, it->yuv_out_ + U_OFF, it->mb_->uv_mode_);