[NTP::RecentTabs] Enable by default and depend on recent tabs flag.

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 ed013a00d6d2c3f18ad961c21477eb6aa0cb1b71..c18dc3efd170948a5a08dc8d46fa97df4e09fc32 100644
--- a/components/ntp_snippets/features.cc
+++ b/components/ntp_snippets/features.cc
@@ -18,7 +18,7 @@ const base::Feature kBookmarkSuggestionsFeature{
     "NTPBookmarkSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kRecentOfflineTabSuggestionsFeature{
-    "NTPOfflinePageSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
+    "NTPOfflinePageSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kSaveToOfflineFeature{
     "NTPSaveToOffline", base::FEATURE_ENABLED_BY_DEFAULT};