Very recently google announced on their official google blog about the release of full setup offline standalone installer for google chrome from now on.
When you go to google chrome site and try to download google chrome, you will get a small file of approx 534 kb which is not the full setup of google chrome as it will again download and google chrome from the internet.
This means that if you have the web installer of google chrome called ChromeSetup.exe, you cannot download and install google chrome with this installer on any computer which is not connected to internet.
If you want to install google chrome on a computer which is not connected to internet then you need to have the full setup offline standalone installer for google chrome.
But the this version of google chrome full setup may not auto update in future but you can configure after installation of google chrome with this offline installer for google chrome.