Chrome version 71.0.3548.0 (Official Build) 94235d806bd7d3be1608cd07bf5118d2cb3f3187-refs/branch-heads/3548@{#1}(32/64 bit)

OS:  Win(7,8,8.1,10) , Mac(10.12.6 , 10.13.1 , 10.13.6 , 10.14)  and Linux(14.04 LTS) OS

Pre-condition: Enable the flag 'Enable using the Google local NTP' and 'New Tab Page Background Selection' from chrome://flags/

What steps will reproduce the problem?
1.Launch chrome and open NTP.
2.Click on 'Gear' icon and click  on 'chrome backgrounds'.
3.Now press down arrow key till focus reaches to last tile and observe.

Actual  : Backgrounds picture tiles appears chopped from bottom
Expected: Backgrounds picture tiles should not be seen chopped from bottom

This is a regression issue broken in 'M-70' series and providing the bisect info below:
Good Build: 70.0.3532.0 (Revision: 585633)
Bad Build:  70.0.3533.0 (Revision: 586155)

You are probably looking for a change made after 585909 (known good), but no later than 585919 (first known bad).

CHANGE-LOG URL:
https://chromium.googlesource.com/chromium/src/+log/cedf15c7b4d8b44acefbb183334a1cb59a713965..7adb12c2303f1be21c3ef69ba92f0323ece71544

Suspecting: https://chromium.googlesource.com/chromium/src/+/cdfd0835f3bb7598748a5eff0b1ec368b64f0eb1

@sweilun: 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. Provided suspect through 'Chromium bisect' script because unable to perform bisect using 'per-revision' bisect script.
2. Tried performing 'per revision' bisect on multiple Windows and Linux machines but unable to perform the same since getting following error:
   (a) Error message on Windows and Linux OS : Unable to find locale data files

Thank you.
 

Deleted: Actual Result.mov 5.2 MB

	Actual Result.mov 5.2 MB View Download

Deleted: Expected Result.mov 4.9 MB

	Expected Result.mov 4.9 MB View Download