cros: Use runtime stylus detection for ash palette.

chrome/browser/resources/settings/device_page/device_page_browser_proxy.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 A helper object used for testing the Device page. */
 cr.exportPath('settings');
 
 /**
  * Mirrors DeviceType from ash/common/system/chromeos/power/power_status.h.
  * @enum {number}
@@ skipping 23 matching lines @@
 settings.BatteryStatus;
 
 cr.define('settings', function() {
   /** @interface */
   function DevicePageBrowserProxy() {}
 
   DevicePageBrowserProxy.prototype = {
     /** Initializes the mouse and touchpad handler. */
     initializePointers: function() {},
 
+    /** Initializes the stylus handler. */
+    initializeStylus: function() {},
+
     /**
      * Override to interact with the on-tap/on-keydown event on the Learn More
      * link.
      * @param {!Event} e
      */
     handleLinkEvent: function(e) {},
 
     /** Initializes the keyboard WebUI handler. */
     initializeKeyboard: function() {},
 
@@ skipping 17 matching lines @@
    */
   function DevicePageBrowserProxyImpl() {}
   cr.addSingletonGetter(DevicePageBrowserProxyImpl);
 
   DevicePageBrowserProxyImpl.prototype = {
     /** @override */
     initializePointers: function() {
       chrome.send('initializePointerSettings');
     },
 
+    /** @override */
+    initializeStylus: function() {
+      chrome.send('initializeStylusSettings');
+    },
+
     /** override */
     handleLinkEvent: function(e) {
       // Prevent the link from activating its parent element when tapped or
       // when Enter is pressed.
       if (e.type != 'keydown' || e.keyCode == 13)
         e.stopPropagation();
     },
 
     /** @override */
     initializeKeyboard: function() {
@@ skipping 14 matching lines @@
     setPowerSource: function(powerSourceId) {
       chrome.send('setPowerSource', [powerSourceId]);
     },
   };
 
   return {
     DevicePageBrowserProxy: DevicePageBrowserProxy,
     DevicePageBrowserProxyImpl: DevicePageBrowserProxyImpl,
   };
 });