Chrome Version: 71.0.3548.0 (Official Build) Revision	94235d806bd7d3be1608cd07bf5118d2cb3f3187-refs/branch-heads/3548@{#1} (32/64-bit)
OS:  Mac(10.12.6, 10.13.1, 10.13.6, 10.14) 

What steps will reproduce the problem?
(1) Launch chrome, open NTP and give 'Print' command on it.
(2) Toggle browser to fullscreen mode then hover mouse on tab strip.
(3) Observe Preview page.

Actual: Unwanted movement of Preview page is seen after toggling browser to fullscreen mode.

Expected: No such a movement should seen.

This is a regression issue, broken in 'M-69', and will soon update the other info:
Good Build:69.0.3494.0 (Revision:575514)
Bad Build: 69.0.3495.0 (Revision:575926)

You are probably looking for a change made after 575689 (known good), but no later than 575690 (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/759983cbb3649ffcaccb528b76230b1bcb93f720..dc764bb8ffc51e8aa2d977721a6a2cfd9afa12c8

Suspect: https://chromium.googlesource.com/chromium/src/+/dc764bb8ffc51e8aa2d977721a6a2cfd9afa12c8

@weili: 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 not seen on Windows(7,8,8.1,10), Linux(14.04 LTS) OS.
2.Issue is also seen on M70 Dev build #70.0.3538.9 and M71 Canary build #71.0.3548.0
 

Deleted: Actual_Preview.mov 6.8 MB

	Actual_Preview.mov 6.8 MB View Download

Deleted: Expected_Preview.mov 4.6 MB

	Expected_Preview.mov 4.6 MB View Download