I believe that one of your Chrome extensions may be the culprit.
1. In Chrome, navigate to chrome://extensions in the address bar (or select Tools > Extensions from the Chrome menu).
2. Disable all extensions (by unchecking the checkboxes to the right of each extension) and try restarting your browser to see if you still receive the notification.
3. Once the notification is gone, re-enable each extension one at a time, restarting your browser each time, to see if you receive the notification.
4. Once you've narrowed down the culprit, decide if it's worth removing or not. You may find alternatives to the extension on the Chrome Web Store. To remove an extension, simply click the Trash Can icon to the right of the extension.
Hope this helps.