As you all know still Linux version of Chrome is not yet released. So it is not possible to install the chrome directly in Ubuntu.
But still you can use it in your Linux box.
Ya Codeweavers have created a Linux port called CrossOver Chromium that can be installed Ubuntu.
It is not a geeky thing its very simple and easy follow this.
Click here and Select the Chromium package for Ubuntu and Debian. (Use Firefox)
In the Firefox download dialogue, select Open with GDebi Package Installer (default)
After the Package Installer has started, click on the Install Package button
Type in your password
CrossOver Chromium is now being installed
Afterwards, click on Close and leave the Package Installer
You can now start Chromium by going to Applications > Crossover Chromium > Chromium
