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

ios/chrome/browser/notification_promo_unittest.cc

 // Copyright (c) 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.
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/json/json_reader.h"
@@ skipping 279 matching lines @@
   void TestMigrationOfOldPrefs() {
     NotificationPromo promo(&local_state_);
     promo.InitFromVariations();
 
     // Pick values for each variable that is saved into old prefs structure.
     double first_view_time = 2.0;
     int views = max_views_ + 1;
     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";
 
     base::DictionaryValue promo_dict;
     promo_dict.Set(promo_list_key, promo_list);
     local_state_.Set(promo_dict_key, promo_dict);
 
     // Initialize promo and verify that its instance variables match the data
     // saved in the old structure.
@@ skipping 117 matching lines @@
       "  \"promo_id\":0"
       "}",
       "What do you think of Chrome?",
       933672366,  // unix epoch for 3 Aug 1999 9:26:06 GMT.
       0, 30, 30);
   InitPromoFromVariations();
   TestMigrationOfOldPrefs();
 }
 
 }  // namespace ios