Add disable flag around supervised user import code.

chrome/browser/resources/options/manage_profile_overlay.js

Index: chrome/browser/resources/options/manage_profile_overlay.js
diff --git a/chrome/browser/resources/options/manage_profile_overlay.js b/chrome/browser/resources/options/manage_profile_overlay.js
index 509d3c2acff94a5acd51977b546b9a240c3b5dd4..72e85249ef49e52749b55ecedad1424b801b3c38 100644
--- a/chrome/browser/resources/options/manage_profile_overlay.js
+++ b/chrome/browser/resources/options/manage_profile_overlay.js
@@ -296,7 +296,8 @@ cr.define('options', function() {
       if (newName == oldName && mode == 'manage') {
         this.hideErrorBubble_(mode);
       } else if (mode == 'create' &&
-                 loadTimeData.getBoolean('allowCreateExistingManagedUsers') &&
+                 !loadTimeData.getBoolean(
+                     'disableCreateExistingManagedUsers') &&
                  $('create-profile-managed').checked) {
         options.ManagedUserListData.requestExistingManagedUsers().then(
             this.receiveExistingManagedUsers_.bind(this),
@@ -567,7 +568,7 @@ cr.define('options', function() {
       $('create-profile-ok').disabled = true;
 
       $('create-profile-managed').checked = false;
-      if (loadTimeData.getBoolean('allowCreateExistingManagedUsers')) {
+      if (!loadTimeData.getBoolean('disableCreateExistingManagedUsers')) {
         $('import-existing-managed-user-link').hidden = false;
         $('create-profile-managed').onchange = function() {
           ManageProfileOverlay.getInstance().onNameChanged_('create');