MD Settings: Add "Show Google Now cards in the launcher" row in Search section.

chrome/browser/resources/settings/search_page/search_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-search-page' is the settings page containing search settings.
  */
 Polymer({
   is: 'settings-search-page',
@@ skipping 18 matching lines @@
     hotwordInfo_: Object,
 
     /**
      * This is a local PrefObject used to reflect the enabled state of hotword
      * search. It is not tied directly to a pref. (There are two prefs
      * associated with  state and they do not map directly to whether or not
      * hotword search is actually enabled).
      * @private {!chrome.settingsPrivate.PrefObject|undefined}
      */
     hotwordSearchEnablePref_: Object,
+
+    /** @private {boolean} */

[stevenjb, 2016/12/14 18:16:06]

nit: {boolean} is not needed for Polymer Boolean properties.

[fukino, 2016/12/15 04:20:41]

Done.

+    googleNowAvailable_: Boolean,
   },
 
   /** @private {?settings.SearchEnginesBrowserProxy} */
   browserProxy_: null,
 
   /** @override */
   created: function() {
     this.browserProxy_ = settings.SearchEnginesBrowserProxyImpl.getInstance();
   },
 
   /** @override */
   ready: function() {
     // Omnibox search engine
     var updateSearchEngines = function(searchEngines) {
       this.set('searchEngines_', searchEngines.defaults);
     }.bind(this);
     this.browserProxy_.getSearchEnginesList().then(updateSearchEngines);
     cr.addWebUIListener('search-engines-changed', updateSearchEngines);
 
     // Hotword (OK Google)
     cr.addWebUIListener(
         'hotword-info-update', this.hotwordInfoUpdate_.bind(this));
     this.browserProxy_.getHotwordInfo().then(function(hotwordInfo) {
       this.hotwordInfoUpdate_(hotwordInfo);
     }.bind(this));
+
+    // Google Now cards in the launcher
+    cr.addWebUIListener(
+        'google-now-availability-changed',
+        this.googleNowAvailabilityUpdate_.bind(this));
+    this.browserProxy_.getGoogleNowAvailability().then(function(available) {
+        this.googleNowAvailabilityUpdate_(available);
+    }.bind(this));
   },
 
   /** @private */
   onChange_: function() {
     var select = /** @type {!HTMLSelectElement} */ (this.$$('select'));
     var searchEngine = this.searchEngines_[select.selectedIndex];
     this.browserProxy_.setDefaultSearchEngine(searchEngine.modelIndex);
   },
 
   /** @private */
@@ skipping 23 matching lines @@
   hotwordInfoUpdate_: function(hotwordInfo) {
     this.hotwordInfo_ = hotwordInfo;
     this.hotwordSearchEnablePref_ = {
       key: 'unused',  // required for PrefObject
       type: chrome.settingsPrivate.PrefType.BOOLEAN,
       value: this.hotwordInfo_.enabled,
     };
   },
 
   /**
+   * @param {boolean} available
+   * @private
+   */
+  googleNowAvailabilityUpdate_: function(available) {
+    this.googleNowAvailable_ = available;
+  },
+
+  /**
    * @return {string}
    * @private
    */
   getHotwordSearchEnableSubLabel_: function() {
     return this.i18n(
         this.hotwordInfo_.alwaysOn ? 'searchOkGoogleSubtextAlwaysOn' :
                                      'searchOkGoogleSubtextNoHardware');
   },
 
   /**
@@ skipping 24 matching lines @@
   },
 
   /**
    * @param {Event} event
    * @private
    */
   doNothing_: function(event) {
     event.stopPropagation();
   }
 });