whispering-gophers: add more TODOs to part 9
whispering-gophers: add more TODOs to part 9

LGTM=campoy
R=campoy
https://codereview.appspot.com/158840043

shenshouer/whispering-gophers,ohkawa/whispering-gophers,amkgo/whispering-gophers,qbektrix/whispering-gophers,egana/whispering-gophers,niiamon/whispering-gophers,quangpn88/whispering-gophers,brentvatne/whispering-gophers,giwa/whispering-gophers,tonyalaribe/whispering-gophers