If your seeing this I guess you are looking to run chromium on a raspberry pi with selenium.
like this Driver = webdriver.Chrome("path/to/chomedriver") or like this webdriver.Chrome()
I have concluded, after hours and a whole night of debugging that you can't install it, because there is no chromedriver compatible with a raspberry pi processor. Even if you download the linux 32bit. You can confirm it by running this line in a terminal window path/to/chromedriver it will give you this error 

cannot execute binary file: Exec format error

Hope this helps anyone that wanted to do this :)
selenium run chrome on raspberry pi