Chrome Version: 72.0.3618.0 (Official Build) Revision	473cb3615ccd757dbfd816963e699299a0732b59-refs/branch-heads/3618@{#1} (32/64-bit)
OS: Windows(7,8,8.1,10), Mac (10.13.1, 10.13.6, 10.14.2) and Linux (14.04 LTS).

What steps will reproduce the problem?
1. Launch Chrome and navigate to chrome://settings page.
2. Zoom in the Settings page so that horizontal scroll bar appears.
3. Now click & hold on right arrow of horizontal scroll-bar till it gets disabled and observe.

Actual: Unnecessary extra gap is seen between horizontal scroll-bar and disabled right arrow.
Expected: No such gap should seen between horizontal scroll-bar and disabled right arrow.

This is a regression issue, broken in M-71 series, below is manual regression range:

Good build: 71.0.3558.0 (Revision: 593043)
Bad build: 71.0.3559.0 (Revision: 593399)

You are probably looking for a change made after 593180 (known good), but no later than 593181 (first known bad).
CHANGE-LOG 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/1da585964eba19534d11d00a1bf3be55b25b75e9..b678fb668cf050db7f630a33c9593262baf7d8a5

Syspecting: https://chromium.googlesource.com/chromium/src/+/b678fb668cf050db7f630a33c9593262baf7d8a5

@szager: 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. Right arrow of scroll-bar doesn't get disabled in good build.
2. This issue is also reproducible on Beta #71.0.3578.62 & Dev #72.0.3610.2

Kindly review the attached screen-cast for reference.

Thank you.
 

Deleted: Actual behavior.mp4 629 KB

	Actual behavior.mp4 629 KB View Download

Deleted: Expected behavior.mp4 334 KB

	Expected behavior.mp4 334 KB View Download