Reorganize accessibility settings.

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
- * 'settings-a11y-page' is the settings page containing accessibility
- * settings.
- *
- * Example:
- *
- *    <iron-animated-pages>
- *      <settings-a11y-page prefs="{{prefs}}"></settings-a11y-page>
- *      ... other pages ...
- *    </iron-animated-pages>
+ * 'settings-a11y-page' is the small section of advanced settings with
+ * a couple of simple settings or links on most platforms, and a link to
+ * a subpage with lots of other settings on Chrome OS.
  */
 Polymer({
   is: 'settings-a11y-page',
 
   properties: {
     /**
+     * The current active route.
+     */
+    currentRoute: {
+      type: Object,
+      notify: true,
+    },
+
+    /**
      * Preferences state.
      */
     prefs: {
       type: Object,
       notify: true,
     },
-
-<if expr="chromeos">
-    /**
-     * Whether to show experimental accessibility features.
-     * @private {boolean}
-     */
-    showExperimentalFeatures_: {
-      type: Boolean,
-      value: function() {
-        return loadTimeData.getBoolean('showExperimentalA11yFeatures');
-      },
-    }
-</if>
   },
 
   /** @private */
-  onMoreFeaturesTap_: function() {
-    window.open(
-        'https://chrome.google.com/webstore/category/collection/accessibility');
+  onManageAccessibilityFeaturesTap_: function() {
+    this.$.pages.setSubpageChain(['manage-a11y']);
   },
 });