G.B.
I think that if CPS asks for anything that the person should do this. Because if they don't the worker can always call the police and just take the kids. IF there is nothing to hide they should not have any issues to showing them even the skeletons in the closet.
I have my computer set to erase my history daily and to not save passwords and stuff. So, if you do that then you are never going to find anything inappropriate on the computer history. Now if they take it to a computer person that will search deeper then they will find every place you've been going for years. Otherwise, no big deal.