MD User Manager: Refactors existing dialogs in User Manager into <user-manager-dialog>

chrome/browser/resources/md_user_manager/import_supervised_user.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 'import-supervised-user' is a popup that allows user to select
+ * @fileoverview 'import-supervised-user' is a dialog that allows user to select
  * a supervised profile from a list of profiles to import on the current device.
  */
 (function() {
 /**
  * It means no supervised user is selected.
  * @const {number}
  */
 var NO_USER_SELECTED = -1;
 
 Polymer({
   is: 'import-supervised-user',
 
   behaviors: [
     I18nBehavior,
   ],
 
   properties: {
     /**
-     * True if the element is currently hidden. The element toggles this in
-     * order to display itself or hide itself once done.
-     * @private {boolean}
-     */
-    popupHidden_: {
-      type: Boolean,
-      value: true
-    },
-
-    /**
      * The currently signed in user and the custodian.
      * @private {?SignedInUser}
      */
     signedInUser_: {
       type: Object,
       value: function() { return null; }
     },
 
     /**
      * The list of supervised users managed by signedInUser_.
      * @private {!Array<!SupervisedUser>}
      */
     supervisedUsers_: {
       type: Array,
       value: function() { return []; }
     },
 
     /**
      * Index of the selected supervised user.
      * @private {number}
      */
     supervisedUserIndex_: {
       type: Number,
       value: NO_USER_SELECTED
     }
   },
 
+  /** override */
+  ready: function() {
+    this.$.dialog.lastFocusableNode = this.$.cancel;
+  },
+
   /**
-   * Displays the popup.
+   * Displays the dialog.
    * @param {(!SignedInUser|undefined)} signedInUser
    * @param {!Array<!SupervisedUser>} supervisedUsers
    */
   show: function(signedInUser, supervisedUsers) {
     this.supervisedUsers_ = supervisedUsers;
     this.supervisedUsers_.sort(function(a, b) {
       if (a.onCurrentDevice != b.onCurrentDevice)
         return a.onCurrentDevice ? 1 : -1;
       return a.name.localeCompare(b.name);
     });
 
     this.supervisedUserIndex_ = NO_USER_SELECTED;
 
     this.signedInUser_ = signedInUser || null;
     if (this.signedInUser_)
-      this.popupHidden_ = false;
-
-    if (this.popupHidden_)
-      return;
-
-    this.async(function() {
-      this.$$('paper-listbox').focus();
-    }.bind(this));
+      this.$.dialog.open();
   },
 
   /**
    * Computed binding that returns the appropriate import message depending on
    * whether or not there are any supervised users to import.
    * @param {!Array<!SupervisedUser>} supervisedUsers
    * @private
    * @return {string}
    */
   getMessage_: function(supervisedUsers) {
     return supervisedUsers.length > 0 ? this.i18n('supervisedUserImportText') :
                                         this.i18n('noSupervisedUserImportText');
   },
 
   /**
-   * Hides the popup.
-   * @private
-   */
-  onCancelTap_: function() {
-    this.popupHidden_ = true;
-  },
-
-  /**
    * Returns true if the 'Import' button should be enabled and false otherwise.
    * @private
    * @return {boolean}
    */
   isImportDisabled_: function(supervisedUserIndex) {
-    return supervisedUserIndex == NO_USER_SELECTED;
+    var disabled = supervisedUserIndex == NO_USER_SELECTED;
+    if (!disabled) {
+      this.$.dialog.lastFocusableNode = this.$.import;
+    }
+    return disabled;
   },
 
   /**
    * Called when the user clicks the 'Import' button. it proceeds with importing
    * the supervised user.
    * @private
    */
   onImportTap_: function() {
     var supervisedUser = this.supervisedUsers_[this.supervisedUserIndex_];
     if (this.signedInUser_ && supervisedUser) {
-      this.popupHidden_ = true;
+      this.$.dialog.close();
       // Event is caught by create-profile.
       this.fire('import', {supervisedUser: supervisedUser,
                            signedInUser: this.signedInUser_});
     }
   }
 });
 })();