Chrome Version       : 64.0.3282.41
OS Version: 10176.22.0

What steps will reproduce the problem?

1. Connect a Chromebox to two 1920x1080 displays.

2. In the ChromeOS Settings menu, configure the displays for standard orientation, stack them vertically, and set the lower display to Primary.
(https://drive.google.com/open?id=1Xm8Q6yqsfaeNAC0ViY-tmYaSPzhAP2aL)

3. On both displays, right-click the shelf and set “Shelf position” to “Left”.

4. On the upper (“Extended”) display, click on the notification panel.


What is the expected result?
The notification tray is displayed normally, as it is if you apply step 4 on the lower (“Primary”) display instead of the upper one.
(https://drive.google.com/open?id=1gLfKN_aSVwvqgz3qNOgnWmSkHmrXHC8j)


What happens instead of that?
The notification tray is clipped to only the top half of the bottom line.
(https://drive.google.com/open?id=1WH_xW-3QfXV2GTyLRwde3azkRaULmBFY)



UserAgentString: Mozilla/5.0 (X11; CrOS x86_64 10176.22.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.41 Safari/537.36