Prevent usage of web payments API over insecure HTTPS.

ios/chrome/browser/payments/payment_request.mm

 // Copyright 2017 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 "ios/chrome/browser/payments/payment_request.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/credit_card.h"
@@ skipping 90 matching lines @@
       contact_profiles_, GetApplicationContext()->GetApplicationLocale(),
       *this);
 
   if (!shipping_profiles_.empty())
     selected_shipping_profile_ = shipping_profiles_[0];
   if (!contact_profiles_.empty())
     selected_contact_profile_ = contact_profiles_[0];
 }
 
 void PaymentRequest::PopulateCreditCardCache() {
-  if (!payments::data_util::ParseBasicCardSupportedNetworks(
-          web_payment_request_.method_data, &supported_card_networks_,
-          &basic_card_specified_networks_)) {
-    // TODO(crbug.com/709036): close the UI and reject the promise since the
-    // data is invalid.
-    return;
-  }
+  // TODO(crbug.com/709036): Validate method data.
+  payments::data_util::ParseBasicCardSupportedNetworks(
+      web_payment_request_.method_data, &supported_card_networks_,
+      &basic_card_specified_networks_);
 
   const std::vector<autofill::CreditCard*>& credit_cards_to_suggest =
       personal_data_manager_->GetCreditCardsToSuggest();
   credit_card_cache_.reserve(credit_cards_to_suggest.size());
 
   for (const auto* credit_card : credit_cards_to_suggest) {
     std::string spec_card_type =
         autofill::data_util::GetPaymentRequestData(credit_card->type())
             .basic_card_payment_type;
     if (std::find(supported_card_networks_.begin(),
@@ skipping 21 matching lines @@
 
   selected_shipping_option_ = nullptr;
   for (auto* shipping_option : shipping_options_) {
     if (shipping_option->selected) {
       // If more than one option has |selected| set, the last one in the
       // sequence should be treated as the selected item.
       selected_shipping_option_ = shipping_option;
     }
   }
 }