diff --git a/chrome/browser/chrome_process_singleton.h b/chrome/browser/chrome_process_singleton.h
index 7567e5b9..dc79446 100644
--- a/chrome/browser/chrome_process_singleton.h
+++ b/chrome/browser/chrome_process_singleton.h
@@ -48,6 +48,12 @@
 
   bool IsSingletonInstanceForTesting() const { return is_singleton_instance_; }
 
+#if BUILDFLAG(IS_WIN)
+  // Must only be called both after initialization of FeatureList and
+  // NotifyOtherProcessOrCreate().
+  void InitializeFeatures();
+#endif
+
   // Create the chrome process singleton instance for the current process.
   static void CreateInstance(const base::FilePath& user_data_dir);
   // Delete the chrome process singleton instance.