Chrome Version : 69.0.3487.0 (Official Build) Revision 5c3042df84f213c3e25cf3d2aceede00fa994ef3-refs/branch-heads/3487@{#1} (64 bit)
OS: Mac 10.13.1 (17B48)

Steps to reproduce:
1. Launch chrome and click on Fullscreen button (Green Traffic Light).
2. Mouse hover on top of the window such that Mac Toolbar appears.
3. Now again click on Fullscreen button (Green Traffic Light) and Observe. 

Actual Result: Unnecessary Gap is seen between Mac Toolbar and Chrome TabStrip.
Expected Result: No Gap should be seen between Mac Toolbar and Chrome TabStrip.

This is a Mac specific Regression issue seen from 'M-62' and providing the bisect info below:
Good Build: 61.0.3163.0 (Revision: 488529)
Bad Build:  62.0.3164.0 (Revision: 488823)

You are probably looking for a change made after 488686 (known good), but no later than 488687 (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/ec87aec251d5a4cf948c827fda3fe99f15b3275b..71aac2d2a2c3f52763834ea1a7b933702ba3b943

Suspect: https://chromium.googlesource.com/chromium/src/+/71aac2d2a2c3f52763834ea1a7b933702ba3b943

@sdy: 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. 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).
2. Issue is not reproducible on Mac (10.12.6, 10.13.6, 10.14), Win (7, 8, 8.1, 10) & Linux (14.04 LTS).

Kindly refer the attached screen-cast.

Thank You..!!

 

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	Screenshot.jpg 238 KB View Download

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	Actual Video.mov 6.0 MB View Download

Deleted: Expected Video.mov 4.9 MB

	Expected Video.mov 4.9 MB View Download