Verify behavior of PaymentRequest constructor.

components/payments/content/payment_details_validation.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_details_validation.h"
 
 #include <set>
 #include <vector>
 
 #include "components/payments/content/payments_validators.h"
 #include "components/payments/mojom/payment_request.mojom.h"
 
 namespace payments {
 namespace {
 
 // Validates ShippingOption or PaymentItem, which happen to have identical
 // fields, except for "id", which is present only in ShippingOption.
 template <typename T>
 bool validateShippingOptionOrPaymentItem(
     const T& item,
     const payments::mojom::PaymentItemPtr& total,
     std::string* error_message) {
-  if (item->label.empty()) {
-    *error_message = "Item label required";
-    return false;
-  }
-
   if (!item->amount) {
     *error_message = "Currency amount required";
     return false;
   }
 
   if (item->amount->currency.empty()) {
     *error_message = "Currency code required";
     return false;
   }
 
@@ skipping 131 matching lines @@
     if (!validatePaymentDetailsModifiers(details->modifiers, details->total,
                                          error_message))
       return false;
   }
   if (!PaymentsValidators::isValidErrorMsgFormat(details->error, error_message))
     return false;
   return true;
 }
 
 }  // namespace payments