The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d3461b9e53092c7a21930e985ee084c65655df70

commit d3461b9e53092c7a21930e985ee084c65655df70
Author: gogerald <gogerald@google.com>
Date: Fri May 04 22:49:35 2018

[Payment] Only display host for payment handler

Bug:  829965 
Change-Id: Ie5873ca649ca0f2e80ef88ef2d8108dc3e8f275e
Reviewed-on: https://chromium-review.googlesource.com/1033476
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556225}
[modify] https://crrev.com/d3461b9e53092c7a21930e985ee084c65655df70/chrome/android/java/src/org/chromium/chrome/browser/payments/ServiceWorkerPaymentAppBridge.java
[modify] https://crrev.com/d3461b9e53092c7a21930e985ee084c65655df70/chrome/browser/android/payments/service_worker_payment_app_bridge.cc
[modify] https://crrev.com/d3461b9e53092c7a21930e985ee084c65655df70/components/payments/content/service_worker_payment_instrument.cc
[modify] https://crrev.com/d3461b9e53092c7a21930e985ee084c65655df70/components/payments/content/service_worker_payment_instrument_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7ca50812c30a33e4961968018170650a6f05c484

commit 7ca50812c30a33e4961968018170650a6f05c484
Author: gogerald <gogerald@google.com>
Date: Mon May 14 18:45:26 2018

[Payments] Display host name for opened payment handler window and elide it from left to right

Bug:  829965 
Change-Id: I0edaa674fc4820dc6229270abd53ba92ae72d18a
Reviewed-on: https://chromium-review.googlesource.com/1057845
Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558387}
[modify] https://crrev.com/7ca50812c30a33e4961968018170650a6f05c484/chrome/browser/ui/views/payments/payment_handler_web_flow_view_controller.cc

gogerald@,

Could you please let us know the exact steps to verify this issue from test team end?

Thanks..!

This is probably more of an engineering task.