Add other times to cookie based on how it was set
Add other times to cookie based on how it was set

The cookie can be set from an unload handler, a page hide handler or a
click handler.  We should be able to store all of these in the cookie to
figure out the most interesting time when we read the cookie.

sdgdsffdsfff/boomerang,forcedotcom/kylie,FredXue/boomerang,FredXue/boomerang,lognormal/boomerang,sdgdsffdsfff/boomerang,levexis/boomerang,lognormal/boomerang,levexis/boomerang,forcedotcom/kylie