SUBTRACT_GREEN 1009 third_party/libwebp/dec/vp8l.c case SUBTRACT_GREEN: SUBTRACT_GREEN 1175 third_party/libwebp/dsp/lossless.c case SUBTRACT_GREEN: SUBTRACT_GREEN 665 third_party/libwebp/enc/vp8l.c VP8LWriteBits(bw, 2, SUBTRACT_GREEN);