Version: 65.0.3325.51 (Official Build) Revision	bf82f5d25853ccdc46fb63304524ca023c1b24c2-refs/branch-heads/3325@{#326}(64-bit)
OS: Mac OS X(10.13.1,10.13.4)

What steps will reproduce the problem?
1. Launch chrome,navigate to http://permission.site/ and open devtools.
2. Now click on 'Full screen' option on page and observe full screen transition
 
Actual: Unwanted white space is seen at the bottom of page after clicking on 'Full screen' button
Expected: Unwanted white space is should not be seen at the bottom of page after clicking on 'Full screen' button

This is regression issue, broken in ‘M 62’ and below is the bisect info :
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).

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/ec87aec251d5a4cf948c827fda3fe99f15b3275b..71aac2d2a2c3f52763834ea1a7b933702ba3b943

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

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

@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.

Thanks!

Note : 
1. The above issue is also seen on Stable/Beta build #64.0.3282.140 and Canary build #66.0.3341.0
2. The above issue is not seen on Windows (7,8,8.1,10),Linux (14.04 LTS) and Mac OS X(10.12.6)
 

Deleted: Actual_video.mov 4.7 MB

	Actual_video.mov 4.7 MB View Download

Deleted: Expected_video.mov 2.5 MB

	Expected_video.mov 2.5 MB View Download