First, there is a huge difference between the chrome lining that is used inside of barrels and "bumper chrome". Chrome lined barrels are quite a bit more durable than non-chrome lined barrels, are more corrosion resistant and greatly retard throat errosion.
Second, as far as accuracy goes in pistols, My Steyr GB, which has a chrome lined barrel is also the most accurate 9mm I own - including my Glock and Belgian Hi-Power. Many M16's and AR15's have chrome lined barrels and are quite accurate. You might not be able to squeeze out as much accuracy as with a long rifle barrel specifically designed for sub 2 MOA accuracy, but they can be extremely accurate.
I don't want nor need a highly accurate barrel. What I need is a super durable barrel that is reasonably well made. What I can't figure out is why I can't seem to find anyone to make such a thing. There are zillions of chrome lined AR15 and AK47 barrels out there. This can't be rocket science.