If you want, I can:

Google does not officially package a "portable" version in a single EXE, but the community-trusted site PortableApps.com provides a clean, safe wrapper for the official Chrome binaries.

You can "trick" the portable installer into working offline by following these steps:

A standard web installer downloads a tiny file that fetches the actual browser data during deployment. An offline installer contains 100% of the required setup files.