+yoshiki

rookrishna@, what happens if you move mouse out of the notification list? Would we re-layout and put the panel to a proper position?

Yes it does re-layout  for other image notification but for the Art project from Google cultural Institute notification it does not .

What is the app name? Is it "Google Arts & Culture"?

Its APOD wallpaper  for chromebooks

Thanks.

That is a chrome app. The screenshot looks like it shows up an a floating bubble rather than inside the notification list. So the problem is probably related to MessagePopupCollection code.

xiyuan@ can you route to a better owner for the MessagePopupCollection code?

Hi xiyuan@! Requesting an update since this is marked as Pri1. If this no longer repros, please can you close the bug? If you're not the best person to deal with this right now, please can you unassign? Thanks!

Lowering to P2 since it is found for one app (APOD wallpaper for chromebooks) per #2 and #4.

Passing to estade@ to re-assign.

I may have caused this regression, or it may be due to recent MD notifications work. Tetsui, could you ptal?

The original bug is quite old so I believe it's not related to either recent refactoring or MD notifications work.
I could not reproduce the bug on 65.0.3319.0 (#0 says the notification overlaps on the uber tray after the animation is finished, not just during the animation, right?). However, the notification does overlap on the uber tray during the animation, and it doesn't look WAI. Let me take a further look.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3f74b246af41caff323ea072d2aee02c7960a9bb

commit 3f74b246af41caff323ea072d2aee02c7960a9bb
Author: Tetsui Ohkubo <tetsui@chromium.org>
Date: Thu Feb 08 01:53:46 2018

Use the bottom edge of notification toast for reposition target.

When the notification popup (or toast, the terms are interchangeable) is
removed, usually the remaining notifications would move down to fill the space.

Previously, we were using the top y coordinate of the removed notification as
the target location of the oldest notification toast, but this was assuming
all the notifications have the same height, which is not true.

This CL changes the behavior to use the bottom y coordinate for the aniamtion
target location.
On some platforms with the task bar on the top of the screen, notification
toasts are aligned top down. In such case, we still have to use the top y
coordinate. GetTargetEdge handles that.

TEST=MessagePopupCollectionTest.MultipleNotificationHeight
BUG= 679397 

Change-Id: I1831d594eea0d741660142f9c5623eaa9c376476
Reviewed-on: https://chromium-review.googlesource.com/895229
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535249}
[modify] https://crrev.com/3f74b246af41caff323ea072d2aee02c7960a9bb/ui/message_center/views/message_popup_collection.cc
[modify] https://crrev.com/3f74b246af41caff323ea072d2aee02c7960a9bb/ui/message_center/views/message_popup_collection.h
[modify] https://crrev.com/3f74b246af41caff323ea072d2aee02c7960a9bb/ui/message_center/views/message_popup_collection_unittest.cc