Fix the pref binding by binding to the object rather than the element

chrome/browser/resources/settings/a11y_page/a11y_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
  * 'cr-settings-a11y-page' is the settings page containing accessibility
  * settings.
  *
  * Example:
  *
  *    <iron-animated-pages>
  *      <cr-settings-a11y-page prefs="{{prefs}}"></cr-settings-a11y-page>
  *      ... other pages ...
  *    </iron-animated-pages>
  *
  * @group Chrome Settings Elements
  * @element cr-settings-a11y-page
  */
 Polymer({
   is: 'cr-settings-a11y-page',
 
   properties: {
     /**
      * Preferences state.
-     *
-     * @type {?CrSettingsPrefsElement}
-     * @default null
      */
     prefs: {
       type: Object,
       notify: true,
     },
 
     /**
      * Route for the page.
      */
     route: String,
@@ skipping 33 matching lines @@
       readOnly: true,
     },
   },
 
   /**
    * Called when the selected value of the autoclick dropdown changes.
    * TODO(jlklein): Replace with binding when paper-dropdown lands.
    * @private
    */
   autoclickSelectChanged_: function() {
-    this.prefs.settings.settings.a11y.autoclick_delay_ms =
+    this.prefs.settings.a11y.autoclick_delay_ms =

[michaelpg, 2015/05/13 23:49:50]

i know I saw this before, but I think you don't need this if you bind using
"{{pref.settings.a11y.autoclick_delay_ms::change}}".

[Jeremy Klein, 2015/05/14 00:53:52]

Done.

         this.$.autoclickDropdown.value;
   },
 });