MD Settings: Restore focus after closing various dialogs.

chrome/browser/resources/settings/reset_page/reset_page.js

 // Copyright 2015 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
  * 'settings-reset-page' is the settings page containing reset
  * settings.
  *
  * Example:
@@ skipping 41 matching lines @@
 
   /** @private */
   onShowResetProfileDialog_: function() {
     settings.navigateTo(settings.Route.RESET_DIALOG,
                         new URLSearchParams('origin=userclick'));
   },
 
   /** @private */
   onResetProfileDialogClose_: function() {
     settings.navigateToPreviousRoute();
+    this.$$('#resetProfile button[is=paper-icon-button-light').focus();

[tommycli, 2017/04/03 15:39:50]

Are we very confident this won't be null? Also I think the selector is missing a
close bracket ]

[dpapad, 2017/04/03 19:23:05]

Fixed closing bracket. Regarding whether it can be null, the button is not
within a dom-if, so it is always present on the page.

[tommycli, 2017/04/03 19:30:51]

Acknowledged. I would probably still recommend giving it an ID to have it be
explicitly addressed (and so we can use the this.$.foo syntax, so future readers
will know it can never be null...)

[dpapad, 2017/04/04 00:03:16]

Done.

   },
 
 // <if expr="chromeos">
   /**
    * @param {!Event} e
    * @private
    */
   onShowPowerwashDialog_: function(e) {
     e.preventDefault();
     this.showPowerwashDialog_ = true;
   },
 
   /** @private */
   onPowerwashDialogClose_: function() {
     this.showPowerwashDialog_ = false;
+    this.$$('#powerwash button[is=paper-icon-button-light').focus();
   },
 // </if>
 });