The stuff that is included with Chrome shouldn't have any impact on performance, the webkit and v8 engines are the same as that of Chromium. For Google, they do

The stuff that is included with Chrome shouldn't have any impact on performance, the webkit and v8 engines are the same as that of Chromium. For Google, they do all their development on Chromium (which is an open source project), then apply a few patches and a new logo on top to get Chrome. It isn't some great conspiracy that they don't distribute Chromium binaries, it simply isn't their end product.