google has a search app: (https://itunes.apple.com/us/app/google-search/id284815942) and facebook has a "just share photos with your friends" app: (https://www.facebook.com/mobile/camera).

While you can bemoan feature creep all you want, the truth is that its hard to remove features one they are in (see http://www.joelonsoftware.com/articles/fog0000000020.html). On the other hand having a specialized tool for a common task is really handy. I like these specialized apps, (though I can't comment on LinkedIn's in particular).