ExpandMatrix      234 third_party/libwebp/enc/quant.c     q4  = ExpandMatrix(&m->y1_, 0);
ExpandMatrix      235 third_party/libwebp/enc/quant.c     q16 = ExpandMatrix(&m->y2_, 1);
ExpandMatrix      236 third_party/libwebp/enc/quant.c     quv = ExpandMatrix(&m->uv_, 2);