Make Use of Value::GetList API

components/ntp_snippets/pref_util.cc

Index: components/ntp_snippets/pref_util.cc
diff --git a/components/ntp_snippets/pref_util.cc b/components/ntp_snippets/pref_util.cc
index 3973cda1b1d53a01b50ae949675412d1c1eb5154..05cf55191d9687cfb467cd45f8922ee327fd820f 100644
--- a/components/ntp_snippets/pref_util.cc
+++ b/components/ntp_snippets/pref_util.cc
@@ -15,8 +15,8 @@ namespace prefs {
 std::set<std::string> ReadDismissedIDsFromPrefs(const PrefService& pref_service,
                                                 const std::string& pref_name) {
   std::set<std::string> dismissed_ids;
-  const base::ListValue* list = pref_service.GetList(pref_name);
-  for (const base::Value& value : *list) {
+  const base::Value* list = pref_service.GetList(pref_name);
+  for (const base::Value& value : list->GetList()) {
     std::string dismissed_id;
     bool success = value.GetAsString(&dismissed_id);
     DCHECK(success) << "Failed to parse dismissed id from prefs param "
@@ -29,9 +29,9 @@ std::set<std::string> ReadDismissedIDsFromPrefs(const PrefService& pref_service,
 void StoreDismissedIDsToPrefs(PrefService* pref_service,
                               const std::string& pref_name,
                               const std::set<std::string>& dismissed_ids) {
-  base::ListValue list;
+  base::Value list(base::Value::Type::LIST);
   for (const std::string& dismissed_id : dismissed_ids) {
-    list.AppendString(dismissed_id);
+    list.GetList().emplace_back(dismissed_id);
   }
   pref_service->Set(pref_name, list);
 }