Offline Page Cache uses user interaction triggers for saving pages.

components/offline_pages/core/offline_page_feature.h

Index: components/offline_pages/core/offline_page_feature.h
diff --git a/components/offline_pages/core/offline_page_feature.h b/components/offline_pages/core/offline_page_feature.h
index 3210afb696e4eddf63f9d3ca31b185248eb4d493..242adb45f4f051bf9b7781539f32d8c7a7c2d6ec 100644
--- a/components/offline_pages/core/offline_page_feature.h
+++ b/components/offline_pages/core/offline_page_feature.h
@@ -12,6 +12,7 @@ namespace offline_pages {
 
 extern const base::Feature kOfflineBookmarksFeature;
 extern const base::Feature kOffliningRecentPagesFeature;
+extern const base::Feature kOffliningUsesNavigationTriggersFeature;
 extern const base::Feature kOfflinePagesSvelteConcurrentLoadingFeature;
 extern const base::Feature kOfflinePagesCTFeature;
 extern const base::Feature kOfflinePagesSharingFeature;
@@ -25,6 +26,14 @@ bool IsOfflineBookmarksEnabled();
 // Returns true if offlining of recent pages (aka 'Last N pages') is enabled.
 bool IsOffliningRecentPagesEnabled();
 
+// Returns true only if both offlining of recent pages is enabled and navigation
+// events should be used to create snapshots of recent pages.
+bool IsOffliningRecentPagesUsingNavigationTriggers();
+
+// Returns true only if both offlining of recent pages is enabled and user
+// interaction events should be used to create snapshots of recent pages.
+bool IsOffliningRecentPagesUsingInteractionTriggers();
+
 // Returns true if offline CT features are enabled.  See crbug.com/620421.
 bool IsOfflinePagesCTEnabled();