UserAgent: Mozilla/5.0 (X11; CrOS x86_64 11151.113.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.127 Safari/537.36
Platform: 11151.113.0 (Official Build) stable-channel lars

Steps to reproduce the problem:
1. With #enable-system-tray-unified Enabled, this scenario starts with the system tray closed (not just collapsed)
2. Get a notification from an Android app
3. Click to see the full notification
4. Click the "x" to dismiss the notification
5. The system tray remains open, which doesn't seem right/desired/necessary

This behavior is inconsistent with what happens if you click on the full notification (i.e. go to the Android app). In that case, the system tray will not remain open. Note also with #enable-system-tray-unified Disabled, there's no issue (i.e., either dismissing or clicking on the full notification, nothing remains open unexpectedly).

What is the expected behavior?
System tray should return to its original closed state after dismissing the notification.

What went wrong?
System tray unexpectedly stayed open after dismissing the notification.

Did this work before? N/A 

Chrome version: 71.0.3578.127  Channel: stable
OS Version: 11151.113.0
Flash Version: 32.0.0.101