I am going to say bad idea and I dont remember why exactly, when you thaw a bird in water you have to keep changing the water or bacteria may develop.
I would thaw in the refrig and rinse then brine. Hopefully someone else has a better answer but I wouldnt do it
I belive you can thaw a chicken fairly quickly under running cold water or put in cold water and change the water frequently, this will keep the water fresh and thaw the bird faster. then brine. this is safer and that is what it is all about.