MD Settings: Fix subpage navigation focus for bluetooth+internet

chrome/browser/resources/settings/bluetooth_page/bluetooth_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 page for managing bluetooth properties and devices. This page
  * just provodes a summary and link to the subpage.
  */
 
@@ skipping 47 matching lines @@
     /**
      * The cached bluetooth adapter state.
      * @type {!chrome.bluetooth.AdapterState|undefined}
      * @private
      */
     adapterState_: {
       type: Object,
       notify: true,
     },
 
+    /** @private {!Map<string, string>} */
+    focusConfig_: {
+      type: Object,
+      value: function() {
+        var map = new Map();
+        map.set(
+            settings.Route.BLUETOOTH_DEVICES.path,
+            '#bluetoothDevices .subpage-arrow');
+        return map;
+      },
+    },
+
     /**
      * Interface for bluetooth calls. May be overriden by tests.
      * @type {Bluetooth}
      * @private
      */
     bluetooth: {
       type: Object,
       value: chrome.bluetooth,
     },
 
@@ skipping 118 matching lines @@
                 chrome.runtime.lastError.message);
           }
         });
   },
 
   /** @private */
   openSubpage_: function() {
     settings.navigateTo(settings.Route.BLUETOOTH_DEVICES);
   }
 });