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

ios/chrome/browser/payments/payment_request_util.mm

Index: ios/chrome/browser/payments/payment_request_util.mm
diff --git a/ios/chrome/browser/payments/payment_request_util.mm b/ios/chrome/browser/payments/payment_request_util.mm
index 3b643adf7075932e797e1499d83db0b685fa8048..07595166e1f3500e4d6e0b96cf7e6166afdd5b0f 100644
--- a/ios/chrome/browser/payments/payment_request_util.mm
+++ b/ios/chrome/browser/payments/payment_request_util.mm
@@ -9,8 +9,10 @@
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_profile.h"
+#include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/field_types.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
+#include "components/autofill/core/browser/validation.h"
 #include "components/payments/core/payment_request_data_util.h"
 #include "components/payments/core/strings_util.h"
 #include "components/strings/grit/components_strings.h"
@@ -71,6 +73,26 @@ NSString* GetAddressNotificationLabelFromAutofillProfile(
   return !label.empty() ? base::SysUTF16ToNSString(label) : nil;
 }
 
+BOOL IsCreditCardCompleteForPayment(
+    const autofill::CreditCard& credit_card,
+    const std::vector<autofill::AutofillProfile*>& billing_profiles) {
+  // EXPIRED cards are considered valid for payment. The user will be prompted
+  // to enter the new expiration at the CVC step.
+  return autofill::GetCompletionStatusForCard(
+             credit_card, GetApplicationContext()->GetApplicationLocale(),
+             billing_profiles) <= autofill::CREDIT_CARD_EXPIRED;
+}
+
+NSString* GetPaymentMethodNotificationLabelFromCreditCard(
+    const autofill::CreditCard& credit_card,
+    const std::vector<autofill::AutofillProfile*>& billing_profiles) {
+  base::string16 label = autofill::GetCompletionMessageForCard(
+      autofill::GetCompletionStatusForCard(
+          credit_card, GetApplicationContext()->GetApplicationLocale(),
+          billing_profiles));
+  return !label.empty() ? base::SysUTF16ToNSString(label) : nil;
+}
+
 NSString* GetShippingSectionTitle(payments::PaymentShippingType shipping_type) {
   switch (shipping_type) {
     case payments::PaymentShippingType::SHIPPING: