[WebPayments] Add the Payment Method section in the Payment Sheet

components/payments/payment_request.cc

Index: components/payments/payment_request.cc
diff --git a/components/payments/payment_request.cc b/components/payments/payment_request.cc
index 1a426c8edf4ddfd3a8a2698727799857b54f3590..06ec2b4f46562699b0baa795d00e07d512754bd2 100644
--- a/components/payments/payment_request.cc
+++ b/components/payments/payment_request.cc
@@ -4,6 +4,7 @@
 
 #include "components/payments/payment_request.h"
 
+#include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/payments/payment_details_validation.h"
 #include "components/payments/payment_request_delegate.h"
 #include "components/payments/payment_request_web_contents_manager.h"
@@ -73,4 +74,23 @@ CurrencyFormatter* PaymentRequest::GetOrCreateCurrencyFormatter(
   return currency_formatter_.get();
 }
 
+autofill::CreditCard* PaymentRequest::GetCurrentlySelectedCreditCard() {
+  // TODO(anthonyvd): Change this code to prioritize server cards and implement
+  // a way to modify this function's return value.
+  autofill::PersonalDataManager* data_manager =
+      delegate_->GetPersonalDataManager();
+
+  const std::vector<autofill::CreditCard*> cards =
+      data_manager->GetCreditCardsToSuggest();
+
+  auto first_complete_card = std::find_if(
+      cards.begin(),
+      cards.end(),
+      [] (autofill::CreditCard* card) {
+        return card->IsValid();
+  });
+
+  return first_complete_card == cards.end() ? nullptr : *first_complete_card;
+}
+
 }  // namespace payments