Downloading Chrome from the official website is the best way for all of us, it’s secure from malware, virus, and it’s always up to date. In the normal way, you will only get the downloader, not the full installer. 😦
Actually, Google has released the offline installer for Chrome. But I don’t know why Google doesn’t tell us the download URL for those files.
I found the URL on the askvg.com website, here they are: