[Payment Request] Makes sure only complete credit cards can be selected

ios/chrome/browser/payments/payment_request_util.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_UTIL_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_UTIL_H_
 
 #import <Foundation/Foundation.h>
 
+#include <vector>
+
 #include "base/strings/string16.h"
 #include "components/payments/core/payment_options_provider.h"
 
 namespace autofill {
 class AutofillProfile;
+class CreditCard;
 }  // namespace autofill
 
 class PaymentRequest;
 
 namespace payment_request_util {
 
 // Helper function to create a name label from an autofill profile. Returns nil
 // if the resulting label is empty.
 NSString* GetNameLabelFromAutofillProfile(
     const autofill::AutofillProfile& profile);
@@ skipping 17 matching lines @@
 // nil if the resulting label is empty.
 NSString* GetEmailLabelFromAutofillProfile(
     const autofill::AutofillProfile& profile);
 
 // Helper function to create a notification label for an address cell from an
 // autofill profile. Returns nil if the resulting label is empty.
 NSString* GetAddressNotificationLabelFromAutofillProfile(
     PaymentRequest& payment_request,
     const autofill::AutofillProfile& profile);
 
+// Returns whether the credit card is complete to be used as a payment method
+// without further editing.
+BOOL IsCreditCardCompleteForPayment(
+    const autofill::CreditCard& credit_card,
+    const std::vector<autofill::AutofillProfile*>& billing_profiles);
+
+// Helper function to create a notification label for what's missing from a
+// credit card. Returns nil if the resulting label is empty.
+NSString* GetPaymentMethodNotificationLabelFromCreditCard(
+    const autofill::CreditCard& credit_card,
+    const std::vector<autofill::AutofillProfile*>& billing_profiles);
+
 // Returns the title for the shipping section of the payment summary view given
 // the shipping type specified in |payment_request|.
 NSString* GetShippingSectionTitle(payments::PaymentShippingType shipping_type);
 
 // Returns the error message to be displayed in the shipping address selection
 // view given the shipping type specified in |payment_request|.
 NSString* GetShippingAddressSelectorErrorMessage(
     const PaymentRequest& payment_request);
 
 // Returns the error message to be displayed in the shipping option selection
 // view given the shipping type specified in |payment_request|.
 NSString* GetShippingOptionSelectorErrorMessage(
     const PaymentRequest& payment_request);
 
 }  // namespace payment_request_util
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_UTIL_H_