The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/600bab5603e925b489b69a83d3d4eb7170a2e649

commit 600bab5603e925b489b69a83d3d4eb7170a2e649
Author: mathp <mathp@chromium.org>
Date: Sun Mar 26 03:47:59 2017

[Payments] Return the preferred payment method name to the merchant

In the PaymentResponse, the method_name field can vary between
"basic-card" and the card network directly (e.g., "visa"), depending
where the network was first specified.

BUG= 701952 
TEST=components_unittests

Review-Url: https://codereview.chromium.org/2779453002
Cr-Commit-Position: refs/heads/master@{#459671}

[modify] https://crrev.com/600bab5603e925b489b69a83d3d4eb7170a2e649/components/payments/content/payment_request_spec.cc
[modify] https://crrev.com/600bab5603e925b489b69a83d3d4eb7170a2e649/components/payments/content/payment_request_spec.h
[modify] https://crrev.com/600bab5603e925b489b69a83d3d4eb7170a2e649/components/payments/content/payment_request_spec_unittest.cc
[modify] https://crrev.com/600bab5603e925b489b69a83d3d4eb7170a2e649/components/payments/content/payment_request_state.cc
[modify] https://crrev.com/600bab5603e925b489b69a83d3d4eb7170a2e649/components/payments/content/payment_request_state_unittest.cc