Accessibility fixes for quick unlock settings.

chrome/browser/resources/settings/people_page/password_prompt_dialog.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
  *
  * 'settings-password-prompt-dialog' shows a dialog which asks for the user to
  * enter their password. It validates the password is correct. Once the user has
  * entered their account password, the page fires an 'authenticated' event and
@@ skipping 63 matching lines @@
     /**
      * PASSWORD_ACTIVE_DURATION_MS value. May be overridden by tests.
      * @private
      */
     passwordActiveDurationMs_: {
       type: Number,
       value: PASSWORD_ACTIVE_DURATION_MS
     },
   },
 
+  /** @override */
+  ready: function() {
+    // The first time the dialog is shown, the password prompt does not
+    // auto-focus itself. However, if the dialog has been created already
+    // and is only being redisplayed, the password input will correctly
+    // capture focus by itself.
+    setTimeout(function() {
+      this.$.passwordInput.focus();

[Dan Beam, 2016/10/26 22:52:09]

don't start a focus storm

[jdufault, 2016/10/26 23:21:08]

Strange, using autofocus works as expected now. I've backed out the
focus-related changes.

+    }.bind(this));
+  },
+
   /**
    * Open up the dialog. This will wait until the dialog has loaded before
    * opening it.
    */
   open: function() {
     // Wait until the dialog is attached to the DOM before trying to open it.
     var dialog = /** @type {{isConnected: boolean}} */ (this.$.dialog);
     if (!dialog.isConnected) {
       setTimeout(this.open.bind(this));
       return;
@@ skipping 95 matching lines @@
     this.quickUnlockPrivate_.getActiveModes(function(modes) {
       var credentials =
           /** @type {!Array<string>} */ (Array(modes.length).fill(''));
       this.quickUnlockPrivate_.setModes(
           this.password_, modes, credentials, onCheck);
     }.bind(this));
   }
 });
 
 })();