Remove base::ListValue::Set(size_t, base::Value*)

ios/chrome/browser/notification_promo_unittest.cc

Index: ios/chrome/browser/notification_promo_unittest.cc
diff --git a/ios/chrome/browser/notification_promo_unittest.cc b/ios/chrome/browser/notification_promo_unittest.cc
index 3299c13234912603fa44f8c36ee18b6625b75d52..2b3718e5fdc53d57b75c247b85c4cb1e6ea25714 100644
--- a/ios/chrome/browser/notification_promo_unittest.cc
+++ b/ios/chrome/browser/notification_promo_unittest.cc
@@ -297,14 +297,14 @@ class NotificationPromoTest : public testing::Test {
     bool closed = true;
 
     // Save data into old prefs structure.
-    base::DictionaryValue* ntp_promo = new base::DictionaryValue;
+    auto ntp_promo = base::MakeUnique<base::DictionaryValue>();
     ntp_promo->SetInteger("id", promo.promo_id_);
     ntp_promo->SetDouble("first_view_time", first_view_time);
     ntp_promo->SetInteger("views", views);
     ntp_promo->SetBoolean("closed", true);
 
     base::ListValue* promo_list = new base::ListValue;
-    promo_list->Set(0, ntp_promo);
+    promo_list->Append(std::move(ntp_promo));
 
     std::string promo_list_key = "mobile_ntp_whats_new_promo";
     std::string promo_dict_key = "ios.ntppromo";