Could the test team please try to reproduce this. Otherwise it will take us a while to find a 2nd monitor setup to verify the issue.

I've recreated the jsbin @ https://output.jsbin.com/maxobus/1 - the previous one expired as it was created with an anonymous account.

Note that the bug doesn't trigger on the embedded version @ https://jsbin.com/maxobus/1/edit?html,output

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Additionally, I've now also seen this on a different display. This one's a creaky old CIBOX LW1922C @ 1440 x 900 resolution connected via a VGA adapter. Also non-retina.

Unable to reproduce the issue on reported version #68.0.3440.68 using MacBook Pro (Retina, 15inch,Mid 2015) 10.13.3  and second screen is  Hp Desktop, running at 1920 x 1080(non-retina), by following below steps

Steps:
=====
1.Launched chrome
2.Moved the window to second screen
3.Resized window to ~450px X 671px
4.Opened the test-case.html and  https://output.jsbin.com/maxobus/1
5.Scrolled down the right side of window - could observe the page repaint is normal.

Attached is the screencast for reference.
@reporter : Could you please try to test this issue by creating new profile with no apps and extensions in it and let us know if the issue still persists and requesting you to test the issue on latest stable #68.0.3440.75, you can download the latest stable from : https://www.chromium.org/getting-involved/dev-channel

Thanks!

Deleted: 868240.mp4 3.2 MB

	868240.mp4 3.2 MB View Download

Oh, man! I was afraid I'd be the only one seeing this...

I've upgraded to #68.0.3440.75, and loaded a new profile with no extensions - can confirm it's still an issue for me. Please see attached screencast.

Deleted: chromium-bug-68-0-3440-75.mov 6.4 MB

	chromium-bug-68-0-3440-75.mov 6.4 MB View Download

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

As a side-note, I'm also seeing this in the Canary channel - #70.0.3508.0

Unable to reproduce the issue on #68.0.3440.75 on using MacBook Pro (Retina, 15inch,Mid 2015) 10.13.3  and second screen is  Hp Desktop, running at 1920 x 1080(non-retina), by followed the steps as per comment#0.
Hence removing Needs-Bisect label as it is not getting reproduced from TE end.Requesting anyone from Blink>Paint team to look into the issue.

Thanks.!

The NextAction date has arrived: 2018-08-13

As per comment #6 and #10, as this issue is not reproducible at TE end, adding 'TE-NeedsTriageHelp' and requesting the appropriate team to look into this issue and help further.

Thanks..

I have to assume it's a device scale factor issue. I'll try to find someone who can try to reproduce.

ccameron@, do you have a setup that might reproduce this?

Assign back if not.

Yes, I can try to reproduce it tomorrow.

Not sure if a change has been made, but this no longer affects me in #69.0.3497.72

Thanks for reporting it fixed in M-69. At this point I think we will not take any further action. Please re-open if the problem recurs.