Turn on Built-in Notifications in Chrome for OS X
Chrome has been using its own notification system for a while, but having two sets of notifications, Chrome and the ones built into OS X, is a little annoying. Luckily, you can now enable your own notifications.
To do this, you will need to enable the flag. Enter this into the address bar
chrome://flags/#enable-native-notifications and enable this feature. After restarting Chrome, all of your notifications should go through OS X’s Action Center. It’s still in early stages of development, so you might notice some issues and no longer receive full-featured notifications, but at least all of your notifications will be in one place.
Chrome Finally Gets Built-in Push Notifications on Mac | Next Network