Chrome version : 68.0.3397.0 (Official Build) dcddf51ec4ce5a464f901c1cf8fc8cc86c9f59b6-refs/heads/master@{#550857}  32/64 bit

OS : Windows(7,8,8.1,10)

Steps to reproduce:
1.Launch Chrome ,navigate to chrome://extensions and click on developer mode slider.
2.Click on 'Load Unpacked' button and add any blank folder.
3.Now resize browser window , try to scroll dialog content up/down using mouse wheel and observe.

Actual Result : In chrome://extensions page, unwanted movement of retry button and scroll bar is seen upon scrolling.
Expected Result :Such  movement of retry button and scroll bar should not be seen upon scrolling.

This is a regression issue broken in ‘M-64’ and using the per-revision bisect providing the bisect results,
Good build: 64.0.3280.0 (Revision : 519959)
Bad build: 64.0.3281.0(Revision : 520391)

Unable to provide the bisect using per-revision script as getting trace back error while doing the bisect. 
Hence providing the bisect using old bisect script.

Narrow bisect:
https://chromium.googlesource.com/chromium/src/+log/8bbde6061d124dc5f98a0c0ffc2e7df995ad54f7..2302f3131d72893e686fe84830a80e1136f68730

Suspect: https://chromium.googlesource.com/chromium/src/+/4db037c893d59ea11d75be89b9847ad708dad012 

@dschuyler: Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Note : Issue is not reproducible on Mac(10.12.6,10.13.1,10.13.5) and Linux(14.04 LTS) OS.

Thank you.
 

Deleted: Actual_result.mp4 1.6 MB

	Actual_result.mp4 1.6 MB View Download

Deleted: Expected_result.mp4 1.4 MB

	Expected_result.mp4 1.4 MB View Download