[multi-profiles] Allow bringing up sign in UI even if all users are restricted per their policies

chrome/browser/resources/login/display_manager.js

Index: chrome/browser/resources/login/display_manager.js
diff --git a/chrome/browser/resources/login/display_manager.js b/chrome/browser/resources/login/display_manager.js
index 3f4ce8b46971406c899c11fd3692df18db8715e8..aaee8efdb8ac25a52d83dc84e13d685ceea76a06 100644
--- a/chrome/browser/resources/login/display_manager.js
+++ b/chrome/browser/resources/login/display_manager.js
@@ -974,6 +974,10 @@ cr.define('cr.ui.login', function() {
   DisplayManager.clearErrors = function() {
     $('bubble').hide();
     this.errorMessageWasShownForTesting_ = false;
+
+    var bubbles = document.querySelectorAll('.bubble-shown');
+    for (var i = 0; i < bubbles.length; ++i)
+      bubbles[i].classList.remove('bubble-shown');
   };
 
   /**