I do not believe there would be any chips from White Star that would have been used as any of the gambling that was done was "hosted" by professional gamblers who I think would have provided the chips and not White Star. In fact White Star put a special notice in the passenger list warning of gambling. See link below for the special notice that was included in the Titanic passenger list.

http://www.phillyseaport.org/web_exhibits/mini_exhibits/titanic_passenger_list/titanic_passenger_list-booklet_page_hi.shtml