Version: 53.0.2763.0 dd933bda0baa6a13ab0120f0056a2b783e459efb-refs/heads/master@{#398752} (32/64-bit)
OS:  Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.10.5, 10.11.4)
URL : https://chrome.google.com/webstore/detail/connected-mind/pmkffmgahaepmhkhkblhopnpleeikokc/related?utm_source=chrome-ntp-icon

What steps will reproduce the problem?
1) Launch chrome and navigate to above url and add app.
2) Now launch app and click on '?' on top of page and overlay gets open.
3) Now place the mouse cursor over scroll bar of page and try to scroll using mouse wheel and observe

Actual : Page doesn't get scroll with mouse wheel after placing mouse cursor over scroll bar
Expected : Page should get scroll with mouse wheel after placing mouse cursor over scroll bar

This is a regression issue broken in 'M-51' and below is the manual regression and Narrow bisect info:
Good build : 51.0.2673.0
Bad build : 51.0.2674.0

Narrow bisect info:
https://chromium.googlesource.com/chromium/src/+log/cb9d633e2f1f1f13881899fa92f356bf8cd79e02..d034150c37234dfa2eedf8fde15f9fedd8c3cd10?pretty=fuller&n=100

Suspecting : r380403 from Narrow bisect 

@bokan : Could you please help to reassign if your change is not the cause for this change.
 

Deleted: Actual_video.mp4 1.1 MB

	Actual_video.mp4 1.1 MB View Download

Deleted: Expected_video.mp4 1.2 MB

	Expected_video.mp4 1.2 MB View Download