diff -up chromium-66.0.3359.117/chrome/browser/supervised_user/supervised_user_url_filter.cc.flatsetfix chromium-66.0.3359.117/chrome/browser/supervised_user/supervised_user_url_filter.cc
--- chromium-66.0.3359.117/chrome/browser/supervised_user/supervised_user_url_filter.cc.flatsetfix	2018-04-30 14:22:23.997461566 -0400
+++ chromium-66.0.3359.117/chrome/browser/supervised_user/supervised_user_url_filter.cc	2018-04-30 14:22:51.867920383 -0400
@@ -368,7 +368,7 @@ SupervisedUserURLFilter::GetFilteringBeh
 
   // Allow navigations to whitelisted origins (currently families.google.com).
   static const base::NoDestructor<base::flat_set<GURL>> kWhitelistedOrigins(
-      {GURL(kFamiliesUrl).GetOrigin()});
+      base::flat_set<GURL>({GURL(kFamiliesUrl).GetOrigin()}));
   if (base::ContainsKey(*kWhitelistedOrigins, effective_url.GetOrigin()))
     return ALLOW;