[NTP Snippets] Move kOfflinePageSuggestionsFeature into the component

components/ntp_snippets/features.cc

Index: components/ntp_snippets/features.cc
diff --git a/components/ntp_snippets/features.cc b/components/ntp_snippets/features.cc
index d3c2387ff2e30b02b5b4f4f1b5acb689cd0f6f40..9ed4735f08e6c1c53121cc13768af2c2ce84e13b 100644
--- a/components/ntp_snippets/features.cc
+++ b/components/ntp_snippets/features.cc
@@ -12,6 +12,9 @@ const base::Feature kArticleSuggestionsFeature{
 const base::Feature kBookmarkSuggestionsFeature{
     "NTPBookmarkSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kOfflinePageSuggestionsFeature{
+    "NTPOfflinePageSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kContentSuggestionsFeature{
     "NTPSnippets", base::FEATURE_DISABLED_BY_DEFAULT};