Fixed enhanced bookmarks experiment state lost durring previous review.

chrome/browser/bookmarks/enhanced_bookmarks_features.cc

Index: chrome/browser/bookmarks/enhanced_bookmarks_features.cc
diff --git a/chrome/browser/bookmarks/enhanced_bookmarks_features.cc b/chrome/browser/bookmarks/enhanced_bookmarks_features.cc
index c8763f7968d9d36c45675e16ee902905404731fd..5ce9b9aefa09d514ad487f7d910f1034f633b698 100644
--- a/chrome/browser/bookmarks/enhanced_bookmarks_features.cc
+++ b/chrome/browser/bookmarks/enhanced_bookmarks_features.cc
@@ -55,7 +55,7 @@ bool GetBookmarksExperimentExtensionID(const PrefService* user_prefs,
   return false;
 }
 
-void UpdateBookmarksExperimentState(const PrefService* user_prefs,
+void UpdateBookmarksExperimentState(PrefService* user_prefs,
                                     PrefService* local_state,
                                     bool user_signed_in) {
   BookmarksExperimentState bookmarks_experiment_state_before =
@@ -111,6 +111,9 @@ void UpdateBookmarksExperimentState(const PrefService* user_prefs,
   UMA_HISTOGRAM_ENUMERATION("EnhancedBookmarks.SyncExperimentState",
                             bookmarks_experiment_new_state,
                             kBookmarksExperimentEnumSize);
+  user_prefs->SetInteger(
+      sync_driver::prefs::kEnhancedBookmarksExperimentEnabled,
+      bookmarks_experiment_new_state);
   if (bookmarks_experiment_state_before != bookmarks_experiment_new_state)
     ForceFinchBookmarkExperimentIfNeeded(local_state,
                                          bookmarks_experiment_new_state);