Download and install the key:~$ wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
Add key repository:~$ sh -c 'echo 'deb http://dl.google.com/linux/chrome/deb/ beta main" >> /etc/apt/sources.list.d/google-chrome-beta.list'
Now update the repspositories and install Google Chrome:~$ apt-get update
~$ apt-get install google-chrome-beta