Add billing address as a mandatory field of Payments credit cards.

components/payments/content/payment_request_state.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/payments/content/payment_request_state.h"
 
 #include <algorithm>
 #include <set>
 #include <utility>
 
@@ skipping 228 matching lines @@
   // TODO(crbug.com/702063): Change this code to prioritize instruments by use
   // count and other means, and implement a way to modify this function's return
   // value.
   const std::vector<std::unique_ptr<PaymentInstrument>>& instruments =
       available_instruments();
   auto first_complete_instrument =
       std::find_if(instruments.begin(), instruments.end(),
                    [](const std::unique_ptr<PaymentInstrument>& instrument) {
                      return instrument->IsCompleteForPayment();
                    });
-
   selected_instrument_ = first_complete_instrument == instruments.end()
                              ? nullptr
                              : first_complete_instrument->get();
-
   UpdateIsReadyToPayAndNotifyObservers();
 }
 
 void PaymentRequestState::UpdateIsReadyToPayAndNotifyObservers() {
   is_ready_to_pay_ =
       ArePaymentDetailsSatisfied() && ArePaymentOptionsSatisfied();
   NotifyOnSelectedInformationChanged();
 }
 
 void PaymentRequestState::NotifyOnSelectedInformationChanged() {
@@ skipping 12 matching lines @@
   if (is_waiting_for_merchant_validation_)
     return false;
 
   if (!profile_comparator()->IsShippingComplete(selected_shipping_profile_))
     return false;
 
   return profile_comparator()->IsContactInfoComplete(selected_contact_profile_);
 }
 
 }  // namespace payments