[Autofill] Implement Credit Card Signin Promo

components/autofill/core/browser/autofill_external_delegate.cc

Index: components/autofill/core/browser/autofill_external_delegate.cc
diff --git a/components/autofill/core/browser/autofill_external_delegate.cc b/components/autofill/core/browser/autofill_external_delegate.cc
index eaa1fd547eacc9a2b63c08b7e86670686f58a3bb..a81613d0b6dce6e19a52e3b0b24c9c8e72d66769 100644
--- a/components/autofill/core/browser/autofill_external_delegate.cc
+++ b/components/autofill/core/browser/autofill_external_delegate.cc
@@ -35,6 +35,7 @@ AutofillExternalDelegate::AutofillExternalDelegate(AutofillManager* manager,
       has_suggestion_(false),
       has_shown_popup_for_current_edit_(false),
       should_show_scan_credit_card_(false),
+      should_show_cc_signin_promo_(false),
       has_shown_address_book_prompt(false),
       weak_ptr_factory_(this) {
   DCHECK(manager);
@@ -55,6 +56,8 @@ void AutofillExternalDelegate::OnQuery(int query_id,
   element_bounds_ = element_bounds;
   should_show_scan_credit_card_ =
       manager_->ShouldShowScanCreditCard(query_form_, query_field_);
+  should_show_cc_signin_promo_ =
+      manager_->ShouldShowCreditCardSigninPromo(query_form_, query_field_);
 }
 
 void AutofillExternalDelegate::OnSuggestionsReturned(
@@ -100,6 +103,22 @@ void AutofillExternalDelegate::OnSuggestionsReturned(
   if (has_suggestion_)
     ApplyAutofillOptions(&suggestions);
 
+  // Append the credit card signin promo, if appropriate.
+  if (has_suggestion_ && should_show_cc_signin_promo_) {
+// No separator on Android.
+#if !defined(OS_ANDROID)
+    Suggestion separator;
+    separator.frontend_id = POPUP_ITEM_ID_SEPARATOR;
+    suggestions.push_back(separator);
+#endif
+
+    Suggestion signin_promo_suggestion(
+        l10n_util::GetStringUTF16(IDS_AUTOFILL_CREDIT_CARD_SIGNIN_PROMO));
+    signin_promo_suggestion.frontend_id =
+        POPUP_ITEM_ID_CREDIT_CARD_SIGNIN_PROMO;
+    suggestions.push_back(signin_promo_suggestion);
+  }
+
 #if !defined(OS_ANDROID)
   // Remove the separator if it is the last element.
   DCHECK_GT(suggestions.size(), 0U);
@@ -181,6 +200,8 @@ void AutofillExternalDelegate::DidAcceptSuggestion(const base::string16& value,
   } else if (identifier == POPUP_ITEM_ID_SCAN_CREDIT_CARD) {
     manager_->client()->ScanCreditCard(base::Bind(
         &AutofillExternalDelegate::OnCreditCardScanned, GetWeakPtr()));
+  } else if (identifier == POPUP_ITEM_ID_CREDIT_CARD_SIGNIN_PROMO) {
+    manager_->client()->StartSigninFlow();
   } else {
     if (identifier > 0)  // Denotes an Autofill suggestion.
       AutofillMetrics::LogAutofillSuggestionAcceptedIndex(position);