--- a/components/signin/core/browser/signin_manager.cc
+++ b/components/signin/core/browser/signin_manager.cc
@@ -302,7 +302,7 @@ void SigninManager::OnGoogleServicesUser
 }
 
 bool SigninManager::IsSigninAllowed() const {
-  return signin_allowed_.GetValue();
+  return false;
 }
 
 void SigninManager::OnSigninAllowedPrefChanged() {