For reasons given above, such a tutorial would necessarily have to be specific to whatever you're trying to embed it in, or maybe at a raw framebuffer level (which isn't terribly useful unless you really are working at that level). Otherwise it'd be huge and different parts of it would not be useful to most people.

With that in mind - third Google result for 'embedding webkit in winforms':

http://aautar.digital-radiation.com/blog/?p=1327