Chrome Version : 72.0.3602.0 (Official Build) Revision 3ed11c88d92e969dea664546a277cfb11eb15201-refs/branch-heads/3602@{#1} (32/64 bit)
OS :Windows(7,8,8.1,10), Mac (10.13.1, 10.13.6, 10.14.1) and Linux(14.04)

Steps to reproduce:
1. Launch chrome press 'Ctrl + P' to open print preview overlay.
2. Choose 'Custom' option for 'Margins' under 'More settings'.
3. Click on 'Fit to width' icon present on the RHS of overlay.
4. Now press tab to get focus on the bottom margin index and observe.

Actual Result  : Page preview appears blank from bottom.
Expected Result: Page preview should be seen properly.

This is a regression issue broken in ‘M-71’ and providing the bisect info below:
Good Build : 71.0.3551.3 (Revision : 590851)
Bad Build  : 71.0.3552.2 (Revision : 591210)

Chromium bisect info:

You are probably looking for a change made after 591108 (known good), but no later than 591109 (first known bad).

CHANGE-LOG URL:
  
https://chromium.googlesource.com/chromium/src/+log/974aa7b559b4361d7410479796becb0b933dc6a4..e73e92b7fbf4206ffdb20282ac73bcbed7cf910e

Suspecting: https://chromium.googlesource.com/chromium/src/+/e73e92b7fbf4206ffdb20282ac73bcbed7cf910e

@rbpotter : 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) Providing suspect using chromium bisect script because unable to perform bisect using 'per-revision' script.
2) Tried performing 'per revision' bisect on multiple Windows and Mac machines but unable to perform the same since getting following error:
   - Error message on Mac OS:[Errno 2] No such file or directory error message
   - Error message on Windows OS: RuntimeError: We don't have enough builds to bisect.

Kindly refer the attached screen-cast.

Thank you..!
 

Deleted: ActualVideo.mp4 1.7 MB

	ActualVideo.mp4 1.7 MB View Download

Deleted: ExpectedVideo.mp4 635 KB

	ExpectedVideo.mp4 635 KB View Download