The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a2fafb96a5ee17ccb46dc192be927d6ece73da39

commit a2fafb96a5ee17ccb46dc192be927d6ece73da39
Author: Mathieu Perreault <mathp@chromium.org>
Date: Wed May 30 11:16:03 2018

[Payments] Use a square ratio for payment instruments that are not credit cards

In the Payment Request sheet, icons should show as square and not squashed.

Bug:  845929 
Change-Id: I619f015d12e98d7cf8125a6cb8c99566e40f1d63
Reviewed-on: https://chromium-review.googlesource.com/1077450
Reviewed-by: Ganggui Tang <gogerald@chromium.org>
Commit-Queue: Mathieu Perreault <mathp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562798}
[modify] https://crrev.com/a2fafb96a5ee17ccb46dc192be927d6ece73da39/chrome/browser/ui/views/payments/payment_method_view_controller.cc
[modify] https://crrev.com/a2fafb96a5ee17ccb46dc192be927d6ece73da39/chrome/browser/ui/views/payments/payment_request_views_util.cc
[modify] https://crrev.com/a2fafb96a5ee17ccb46dc192be927d6ece73da39/chrome/browser/ui/views/payments/payment_sheet_view_controller.cc

Your change meets the bar and is auto-approved for M68. Please go ahead and merge the CL to branch 3440 manually. Please contact milestone owner if you have questions.
Owners: cmasso@(Android), kariahda@(iOS), bhthompson@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dc5c21de66e2861a5fe846ade84ee526c0e5d714

commit dc5c21de66e2861a5fe846ade84ee526c0e5d714
Author: Mathieu Perreault <mathp@chromium.org>
Date: Thu May 31 11:59:36 2018

[Payments] Use a square ratio for payment instruments that are not credit cards

In the Payment Request sheet, icons should show as square and not squashed.

TBR=mathp@chromium.org

(cherry picked from commit a2fafb96a5ee17ccb46dc192be927d6ece73da39)

Bug:  845929 
Change-Id: I619f015d12e98d7cf8125a6cb8c99566e40f1d63
Reviewed-on: https://chromium-review.googlesource.com/1077450
Reviewed-by: Ganggui Tang <gogerald@chromium.org>
Commit-Queue: Mathieu Perreault <mathp@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#562798}
Reviewed-on: https://chromium-review.googlesource.com/1080256
Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Cr-Commit-Position: refs/branch-heads/3440@{#59}
Cr-Branched-From: 010ddcfda246975d194964ccf20038ebbdec6084-refs/heads/master@{#561733}
[modify] https://crrev.com/dc5c21de66e2861a5fe846ade84ee526c0e5d714/chrome/browser/ui/views/payments/payment_method_view_controller.cc
[modify] https://crrev.com/dc5c21de66e2861a5fe846ade84ee526c0e5d714/chrome/browser/ui/views/payments/payment_request_views_util.cc
[modify] https://crrev.com/dc5c21de66e2861a5fe846ade84ee526c0e5d714/chrome/browser/ui/views/payments/payment_sheet_view_controller.cc

Able to reproduce the issue on Mac 10.13.3 using chrome build without fix.

Verified the fix on Mac 10.13.3, Win-10 and Ubuntu 17.10 using Chrome version #69.0.3446.0 as per the comment #0.
Attaching screen shots for reference.
Observed that the Payment Request sheet, icons showed as square and not squashed.
Hence, the fix is working as expected. 
Adding the verified labels.

Thanks...!!

Attaching screen shots

Deleted: chrome_version@M69.0.3446.0.png 555 KB

	chrome_version@M69.0.3446.0.png 555 KB View Download

Deleted: 845929@bobpay.png 195 KB

	845929@bobpay.png 195 KB View Download