[Payments] Show what's missing for incomplete payment methods.

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 <set>
 
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
@@ skipping 161 matching lines @@
     selected_shipping_profile_ = shipping_profiles()[0];
 
   if (!contact_profiles().empty())
     selected_contact_profile_ = contact_profiles()[0];
 
   // 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();
-                   });
+  auto first_complete_instrument = std::find_if(
+      instruments.begin(), instruments.end(),
+      [](const std::unique_ptr<PaymentInstrument>& instrument) {
+        return instrument->IsCompleteForPayment(/*missing_info=*/nullptr);
+      });
 
   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() {
   for (auto& observer : observers_)
     observer.OnSelectedInformationChanged();
 }
 
 bool PaymentRequestState::ArePaymentDetailsSatisfied() {
   // There is no need to check for supported networks, because only supported
   // instruments are listed/created in the flow.
   return selected_instrument_ != nullptr &&
-         selected_instrument_->IsCompleteForPayment();
+         selected_instrument_->IsCompleteForPayment(/*missing_info=*/nullptr);
 }
 
 bool PaymentRequestState::ArePaymentOptionsSatisfied() {
   // TODO(mathp): Have a measure of shipping address completeness.
   if (spec_->request_shipping() && selected_shipping_profile_ == nullptr)
     return false;
 
   profile_util::PaymentsProfileComparator comparator(app_locale_, *spec_);
   return comparator.IsContactInfoComplete(selected_contact_profile_);
 }
 
 }  // namespace payments