Add base::FeatureParam<> struct

components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc

Index: components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
diff --git a/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc b/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
index 43be2a4daa6fc31d291f82b8c6c3692a164520ae..3e9b6c1291edfab60cbc67a178f07299719aa92a 100644
--- a/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
+++ b/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
@@ -32,15 +32,8 @@ namespace ntp_snippets {
 
 namespace {
 
-const int kDefaultMaxSuggestionsCount = 5;
-
-const char* kMaxSuggestionsCountParamName = "recent_tabs_max_count";
-
-int GetMaxSuggestionsCount() {
-  return variations::GetVariationParamByFeatureAsInt(
-      kRecentOfflineTabSuggestionsFeature, kMaxSuggestionsCountParamName,
-      kDefaultMaxSuggestionsCount);
-}
+const base::FeatureParam<int> kMaxSuggestionsCountParam{
+    &kRecentOfflineTabSuggestionsFeature, "recent_tabs_max_count", 5};
 
 struct OrderUIItemsByMostRecentlyCreatedFirst {
   bool operator()(const DownloadUIItem* left,
@@ -279,7 +272,8 @@ RecentTabSuggestionsProvider::GetMostRecentlyCreatedWithoutDuplicates(
   std::vector<ContentSuggestion> suggestions;
   for (const DownloadUIItem* ui_item : ui_items) {
     suggestions.push_back(ConvertUIItem(*ui_item));
-    if (static_cast<int>(suggestions.size()) == GetMaxSuggestionsCount()) {
+    if (static_cast<int>(suggestions.size()) ==
+        kMaxSuggestionsCountParam.Get()) {
       break;
     }
   }