Site Settings Desktop: Implement USB devices section.

chrome/browser/resources/settings/route.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.
 
 cr.define('settings', function() {
   /**
    * Class for navigable routes. May only be instantiated within this file.
    * @constructor
    * @param {string} path
    * @private
@@ skipping 161 matching lines @@
   r.SITE_SETTINGS_MICROPHONE = r.SITE_SETTINGS.createChild(
       'microphone', 'site-settings-category-microphone');
   r.SITE_SETTINGS_NOTIFICATIONS = r.SITE_SETTINGS.createChild(
       'notifications', 'site-settings-category-notifications');
   r.SITE_SETTINGS_PLUGINS = r.SITE_SETTINGS.createChild(
       'plugins', 'site-settings-category-plugins');
   r.SITE_SETTINGS_POPUPS = r.SITE_SETTINGS.createChild(
       'popups', 'site-settings-category-popups');
   r.SITE_SETTINGS_UNSANDBOXED_PLUGINS = r.SITE_SETTINGS.createChild(
       'unsandboxedPlugins', 'site-settings-category-unsandboxed-plugins');
+  r.SITE_SETTINGS_USB_DEVICES = r.SITE_SETTINGS.createChild(
+      'usbDevices', 'site-settings-category-usb-devices');
 
   r.SITE_SETTINGS_AUTOMATIC_DOWNLOADS_DETAILS =
       r.SITE_SETTINGS_AUTOMATIC_DOWNLOADS.createChild('details',
                                                       'site-details');
   r.SITE_SETTINGS_BACKGROUND_SYNC_DETAILS =
       r.SITE_SETTINGS_BACKGROUND_SYNC.createChild('details', 'site-details');
   r.SITE_SETTINGS_CAMERA_DETAILS =
       r.SITE_SETTINGS_CAMERA.createChild('details', 'site-details');
   r.SITE_SETTINGS_COOKIES_DETAILS =
       r.SITE_SETTINGS_COOKIES.createChild('details', 'site-details');
@@ skipping 185 matching lines @@
 
   return {
     Route: Route,
     RouteObserverBehavior: RouteObserverBehavior,
     getRouteForPath: getRouteForPath,
     getCurrentRoute: getCurrentRoute,
     getQueryParameters: getQueryParameters,
     navigateTo: navigateTo,
   };
 });