Google Chrome	70.0.3514.0 (Official Build) dev (64-bit) (cohort: Dev)
Windows 10
Also reproduces on desktop in 70 with a slightly different interface design (see screenshot).

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This is fixed in 70.0.3518.0 with #ntp-custom-links enabled.

Google Chrome	70.0.3524.2 (Official Build) dev (64-bit)
Firmware Version	Google_Lulu.6301.136.57

Reopening since the issue repros even with #ntp-custom-links enabled. 

Both with and without the flag enabled, the toast will appear below the tile but it will not be announced and user has no way of knowing that it appeared. 

Regarding the toast not being announced:
The notification has role="alert", which should announce it to screen readers if visibility is changed. In this case, we remove the class that sets "display:none" when the notification is shown, which should trigger the alert event. However, this doesn't seem to be the case, and I suspect that the style attribute must be set on the element directly.

I think the explicit focus on 'Undo' (crrev.com/c/1188492) will resolve this.

Currently (70.0.3530.0) on CrOS, removing a custom link announces, "Alert Shortcut removed Undo Restore default shortcuts Google" because focus moves to the Google logo. After the focus change, it should change to ""Alert Shortcut removed Undo Restore default shortcuts Undo".

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f107e6c78054dca34047d4a029f92b9d3bff7177

commit f107e6c78054dca34047d4a029f92b9d3bff7177
Author: Weilun Shi <sweilun@chromium.org>
Date: Wed Sep 05 02:18:04 2018

[NTP] Focus on undo button when notification bar float up

When the custom link tile gets modified(add/edit/delete), focusing on
the undo button on the notification bar. Using tab on undo button can
navigate to restore button as well.

Bug:  873978 ,  865840 
Change-Id: Idf8420d3622e645e8980fc40be5682028daf8638
Reviewed-on: https://chromium-review.googlesource.com/1188492
Reviewed-by: Kristi Park <kristipark@chromium.org>
Commit-Queue: Weilun Shi <sweilun@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588741}
[modify] https://crrev.com/f107e6c78054dca34047d4a029f92b9d3bff7177/chrome/browser/resources/local_ntp/custom_links_edit.js
[modify] https://crrev.com/f107e6c78054dca34047d4a029f92b9d3bff7177/chrome/browser/resources/local_ntp/local_ntp.js
[modify] https://crrev.com/f107e6c78054dca34047d4a029f92b9d3bff7177/chrome/browser/resources/local_ntp/most_visited_single.js

Able to reproduce the issue on Windows 10 on the reported version 69.0.3473.0 and but unable to verify the fix on the latest M-71(71.0.3544.0) build as the same bad behavior is observed.

Steps:
=======
1. Launched Chrome and opened NTP.
2. Navigated to the small x next to one of the tiles, by pressing the tab key and press enter to remove it.
3. Cannot observe the focus on undo button
Attached is the screen cast for reference.

Note: Tried the issue by enabling/disabling the flag #ntp-custom-links and unable to observe the good behavior.

sweilun@ Request you to check and confirm if anything is missed from our end in verifying the issue and help us in verifying the fix on the latest M-71 build.

Thanks..

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	865840-M71.mp4 461 KB View Download

It's weird that this UI should be obsoleted by now. We don't use the square most visited tile anymore. Kindly refer to the screencast on the latest Windows chromium. 

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 Issue 893519  has been merged into this issue.

Reassigning to add to remote NTP