1)Run the command below to add Linux-repository public key from Google..

wget -q -O – https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add –

2)Run the comman dsudo gedit /etc/apt/sources.list.d/google.list and paste the below given code

deb http://dl.google.com/linux/chrome/deb/ stable main

3)Run deb http://dl.google.com/linux/chrome/deb/ stable main