MD User Manager: Hides 'import supervised user' link while loading supervised users.

chrome/browser/resources/md_user_manager/create_profile.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview 'create-profile' is a page that contains controls for creating
  * a (optionally supervised) profile, including choosing a name, and an avatar.
  */
 
 /** @typedef {{url: string, label:string}} */
@@ skipping 466 matching lines @@
                             profileName) {
     // TODO(mahmadi): Figure out a way to add 'paper-input-extracted' as a
     // dependency and cast to PaperInputElement instead.
     /** @type {{validate: function():boolean}} */
     var nameInput = this.$.nameInput;
     return createInProgress || loadingSupervisedUsers || !profileName ||
            !nameInput.validate();
   },
 
   /**
-   * Returns True if the import supervised user link should be hidden.
-   * @param {boolean} createInProgress True if create/import is in progress
+   * Returns True if the import existing supervised user link should be hidden.
+   * @param {boolean} createInProgress True if create/import is in progress.
+   * @param {boolean} loadingSupervisedUsers True if supervised users are being
+   *     loaded.
    * @param {number} signedInUserIndex Index of the selected signed-in user.
    * @return {boolean}
    * @private
    */
-  isImportUserLinkHidden_: function(createInProgress, signedInUserIndex) {
-    return createInProgress || !this.signedInUser_(signedInUserIndex);
+  isImportUserLinkHidden_: function(createInProgress,
+                                    loadingSupervisedUsers,
+                                    signedInUserIndex) {
+    return createInProgress || loadingSupervisedUsers ||
+        !this.signedInUser_(signedInUserIndex);
   },
 
   /**
    * Computed binding that returns True if there are any signed-in users.
    * @param {!Array<!SignedInUser>} signedInUsers signed-in users.
    * @return {boolean}
    * @private
    */
   isSignedIn_: function(signedInUsers) {
     return signedInUsers.length > 0;
   }
 });
 }());