um, there is more than one titration possible here. if there is AgNO3 or AgSCN, you can use its solution to determine the amount of chloride.
As for the titration with HCl, I think you should titrate to somewhat below pH 7 and heat the solution mildly while titrating, but I think that the pH will get through the range between say pH 10 and pH 4 within at most a couple of drops (if you don't dilute one of the solutions VERY much), so if you can live with a percent or two amiss you can use pH7 as endpoint.