Chrome version: 68.0.3432.0 (Official Build) Revision 689c2c26c46f3dfb040f465f09189b6e8da49261-refs/branch-heads/3432@{#1} (32/64-bit) 

OS: Mac(10.12.6, 10.13.1, 10.13.5).

Pre-Condiiton: Enable 'Use Views browser windows instead of Cocoa' flag from chrome://flags and relaunch the browser.

Steps to reproduce:
1. Launch chrome, navigate to NTP and open dev-tools.
2. Click on chevron (>>) icon and observe the menu.

Actual Result: Unwanted extra space is seen on drop-down menu.
Expected Result: Extra space should not be seen on drop-down menu.

This is a regression issue, broken in 'M-68', and below is the bisect provided using per-revision script.
Good Build:68.0.3431.0 (Revision:558558)
Bad Build: 68.0.3432.0 (Revision:558914)

You are probably looking for a change made after 558725 (known good), but no later than 558726 (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/b67362ed51d2549ac2d8f89074cdd8d08e37bc39..b878d97c1be5685f677ea1d15d55c8a6c0219121

Suspect: https://chromium.googlesource.com/chromium/src/+/b878d97c1be5685f677ea1d15d55c8a6c0219121

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

Note:
1.Issue is MAC OS specific and is not reproducible on Win(7,8,8.1,10), Linux(14.04 LTS) OS
 

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	Actual Result.mov 2.0 MB View Download

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	Expected_result.mov 7.6 MB View Download