Restored an option to enable enhanced bookmarks experiment from Finch

chrome/browser/bookmarks/enhanced_bookmarks_features.h

Index: chrome/browser/bookmarks/enhanced_bookmarks_features.h
diff --git a/chrome/browser/bookmarks/enhanced_bookmarks_features.h b/chrome/browser/bookmarks/enhanced_bookmarks_features.h
index c3bf9591dc17834bc481ccc26d2ad621cd0a0dee..f3a3771411edda6914fdfac273aa96488895e3c3 100644
--- a/chrome/browser/bookmarks/enhanced_bookmarks_features.h
+++ b/chrome/browser/bookmarks/enhanced_bookmarks_features.h
@@ -14,9 +14,20 @@ class PrefService;
 enum BookmarksExperimentState {
   kNoBookmarksExperiment,
   kBookmarksExperimentEnabled,
-  kBookmarksExperimentEnabledUserOptOut
+  kBookmarksExperimentEnabledUserOptOut,
+  kBookmarksExperimentEnabledFromFinch,
+  kBookmarksExperimentOptOutFromFinch,
+  kBookmarksExperimentEnabledFromFinchUserSignedIn,
+  kBookmarksExperimentEnumSize
 };
 
+bool IsBookmarksExperimentEnabled(const PrefService* user_prefs,
+                                  std::string* extension_id);
+
+void UpdateBookmarksExperimentState(const PrefService* user_prefs,
+                                    PrefService* local_state,
+                                    bool user_signed_in);
+
 // Sets flag to opt-in user into Finch experiment.
 void UpdateBookmarksExperiment(
     PrefService* local_state,
@@ -25,6 +36,9 @@ void UpdateBookmarksExperiment(
 // Returns true if enhanced bookmarks experiment is enabled.
 bool IsEnhancedBookmarksExperimentEnabled();
 
+// Returns true if enhanced bookmarks experiment is enabled from Finch.
+bool IsEnhancedBookmarksExperimentEnabledFromFinch();
+
 // Returns true when flag enable-dom-distiller is set or enabled from Finch.
 bool IsEnableDomDistillerSet();