docs for 12873
docs for 12873

BS3 commits: a0ac99efbf201f03106f392bce7045d8563064d9

aaroncnhk/todc-bootstrap,2947721120/todc-bootstrap,up2vs/todc-bootstrap,mozillo/todc-bootstrap,2947721120/googlebt4,todc/todc-bootstrap,todc/todc-bootstrap,todc/todc-bootstrap,ztx1491/todc-bootstrap