Chrome Version : 71.0.3569.0 (Official Build) fb87327b9e0a0a50c96e084943e5525c25f76fd1-refs/branch-heads/3569@{#1} 32/64 bit
OS : Windows(7, 8, 8.1 ,10), Mac(10.12.6, 10.13.1, 10.14.1, 10.13.6), Linux(14.04 LTS)

Steps to reproduce:
1. Launch chrome, navigate to chrome://flags, click on 'Reset all to default' and relaunch browser.
2. Open NTP, click on 'Gear' icon and click on 'chrome backgrounds'.
3. Now press 'down arrow' button and observe.

Actual Result  :Flickering of contents is seen after pressing down arrow key on chrome background overlay.
Expected Result:Flickering of contents should not be  seen after pressing down arrow key on chrome background overlay.

This is a regression issue, broken in 'M-70', and below is the bisect info:
Good Build: 70.0.3537.0 (Revision: 587303)
Bad Build : 70.0.3538.0 (Revision: 587811)

Change-Log URL:
https://chromium.googlesource.com/chromium/src/+log/70.0.3537.0..70.0.3538.0?pretty=fuller&n=10000

Suspecting: r587382 ?

@sweilun: Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note:
1.Unable to provide 'per-revision' bisect as it shows "We don't have enough builds to bisect" error message.
2.Tried on other machines but still getting the same error again.
3.Unable to perform 'chromium bisect' script as issue is not reproducible on chromium builds, hence providing suspect through Manual change-log.


 

Deleted: Actual_Result.mp4 1.8 MB

	Actual_Result.mp4 1.8 MB View Download

Deleted: Expected_Result.mp4 732 KB

	Expected_Result.mp4 732 KB View Download