The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8ac00d0744f66886dcd0dec7e6f89993d303c4bf

commit 8ac00d0744f66886dcd0dec7e6f89993d303c4bf
Author: Jinho Bang <jinho.bang@samsung.com>
Date: Tue Apr 17 04:43:57 2018

PaymentHandler: Not allow to call operation if event is not trusted

Related spec change:
  https://github.com/w3c/payment-handler/pull/294

Bug:  833530 
Change-Id: I65d0e01bb5b6bfdd44925b90ba98837161cc136b
Reviewed-on: https://chromium-review.googlesource.com/1013664
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Commit-Queue: Jinho Bang <jinho.bang@samsung.com>
Cr-Commit-Position: refs/heads/master@{#551238}
[add] https://crrev.com/8ac00d0744f66886dcd0dec7e6f89993d303c4bf/third_party/WebKit/LayoutTests/external/wpt/payment-handler/untrusted-event.https.html
[add] https://crrev.com/8ac00d0744f66886dcd0dec7e6f89993d303c4bf/third_party/WebKit/LayoutTests/external/wpt/payment-handler/untrusted-event.js
[modify] https://crrev.com/8ac00d0744f66886dcd0dec7e6f89993d303c4bf/third_party/blink/renderer/modules/payments/can_make_payment_event.cc
[modify] https://crrev.com/8ac00d0744f66886dcd0dec7e6f89993d303c4bf/third_party/blink/renderer/modules/payments/payment_request_event.cc