ANMF_CHUNK_SIZE   301 third_party/libwebp/demux/demux.c   const uint32_t anmf_payload_size = frame_chunk_size - ANMF_CHUNK_SIZE;
ANMF_CHUNK_SIZE   307 third_party/libwebp/demux/demux.c       NewFrame(mem, ANMF_CHUNK_SIZE, frame_chunk_size, &frame);