[Autofill] Implement Autofill Assistant infobar for iOS

components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc

Index: components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc
diff --git a/components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc b/components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc
index 432bb262becf4bb2ec5a594c2d22a3a73b09b7e5..c79d465c41dbfb344886ffdb9941910403cbd069 100644
--- a/components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc
+++ b/components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.cc
@@ -23,8 +23,13 @@ AutofillCreditCardFillingInfoBarDelegateMobile::
       had_user_interaction_(false),
       was_shown_(false),
       issuer_icon_id_(CreditCard::IconResourceId(card.type())),
+#if defined(OS_IOS)
+      card_label_(card.TypeAndLastFourDigits()),
+#else
       card_label_(base::string16(kMidlineEllipsis) + card.LastFourDigits()),
-      card_sub_label_(card.AbbreviatedExpirationDateForDisplay()) {}
+#endif
+      card_sub_label_(card.AbbreviatedExpirationDateForDisplay()) {
+}
 
 AutofillCreditCardFillingInfoBarDelegateMobile::
     ~AutofillCreditCardFillingInfoBarDelegateMobile() {
@@ -42,8 +47,14 @@ int AutofillCreditCardFillingInfoBarDelegateMobile::GetIconId() const {
 
 base::string16 AutofillCreditCardFillingInfoBarDelegateMobile::GetMessageText()
     const {
+#if defined(OS_ANDROID)
   return l10n_util::GetStringUTF16(
       IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_TITLE);
+#elif defined(OS_IOS)
+  // On iOS the card details are in the title of the infobar.
+  return l10n_util::GetStringFUTF16(
+      IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_FORMATTED_TITLE, card_label_);
+#endif
 }
 
 void AutofillCreditCardFillingInfoBarDelegateMobile::InfoBarDismissed() {