Chrome version: 69.0.3481.0 (Official Build) Revision 1256f448450290ca3d700e80543015dc6f028656-refs/branch-heads/3481@{#1}(32/64-bit)
OS: Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.12.6,10.13.1,10.13.6)

What steps will reproduce the problem?
1. Launch chrome,navigate to chrome://bookmarks 
2. Now zoom in page to 500% and click on 'Organize' button on top RHS to open list,observe 
 
Actual: Vertical scroll bar is not seen on chrome://bookmarks page after page is zoom in to 500%
Expected: Vertical scroll bar should be seen on chrome://bookmarks page after page is zoom in to 500%

This is regression issue, broken in ‘M 61’ and below is the bisect info :
Good build: 61.0.3148.0  (Revision: 484022).
Bad build: 61.0.3149.0 (Revision: 484159).

You are probably looking for a change made after 484078 (known good), but no later than 484079 (first known bad).

CHANGELOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

https://chromium.googlesource.com/chromium/src/+log/41ace186a3e2cb6001a328ca88c9795ace2f11cd..de8088188edebdcfbc05eb14cd5a238c25ae2fc2

Suspect : https://chromium.googlesource.com/chromium/src/+/de8088188edebdcfbc05eb14cd5a238c25ae2fc2

From the CL above, assigning the issue to the concern owner 

@calamity- 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: Issue is also seen on M-67 Stable (build # 67.0.3396.99), M-68 Beta (build #68.0.3440.42) and M-69 Dev (build #69.0.3472.3)
 

Deleted: Actual_video.mp4 235 KB

	Actual_video.mp4 235 KB View Download

Deleted: Expected_video.mp4 295 KB

	Expected_video.mp4 295 KB View Download