>Breeding two Pokemon with normal abilities will never result in a Pokemon with a hidden ability. To breed a Pokemon with a hidden ability, the female Pokemon (or a male/genderless Pokemon being bred with a ditto) must have its hidden ability. It will have a 60% chance of passing on the hidden ability.
The Froakie will not have the hidden ability just because the Chesnaught has a hidden ability, otherwise, as stated above, it's a 60% chance. Sorry.