Using Selenium on Raspberry Pi with Chromium
Ubuntu has builds of chromium-chromedriver as .deb files for armhf.
On launchpad, therefore, you can find chromium-chromedriver armhf builds available for download. Just download the latest version, and since they have no dependencies, you can install by running dpkg -i chromium-chromedriver_58.0.3029.96-0ubuntu0.14.04.1174_armhf.deb. Then chromedriver will be available in /usr/lib/chromium-browser/chromedriver.
At the moment Chrome Driver dont support ARM processors architecture anymore.
https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=95322