If you want to use Google Chrome in Ubuntu (Linux), without Wine etc., then it is a great news for you that Google has announced its Linux Version of Google Chrome. Though it is in Beta right now, but it would still be better to use the Linux made version of Google Chrome, instead of Wine, Chromium etc. (or other if any).
Download Google Chrome for Ubuntu (Linux)
Google Chrome Extensions / Addons
To download the extensions, addons for Google Chrome, visit the following websites: