Chrome Version: (copy from chrome://version)
OS: (e.g. Win7, OSX 10.9.5, etc...)

What steps will reproduce the problem?
(1) Show multiple popups which have different heights
(2) Close the button one by clicking the close button

What is the expected result?
The other notification moves down, and the close button on the notification should be placed at the same position of the close button on the closes notification.

What happens instead?
The other notification moves down, and the close button on the notification is placed the position of previous closed button.

Please use labels and text to provide additional information.
It was working well with old-style notification.