It is possible to permanently turn off predictions from google and the web, however predictions from your browsing history can't be turned off. You can temporarily stop them from appearing by deleting your browsing history or using incognito mode (CTRL+SHIFT+N).
To turn off web predictions:
- Click the Chrome menu
- Click Settings > Show advanced settings.
- In the "Privacy" section, uncheck "Use a prediction service to help complete searches and URLs typed in the address bar."
You can also try installing the "No History" extension in chrome which will prevent chrome from collecting any history and thereby stopping the predictions, however the downside is you wont be able to view your browsing history at all.