[Hotword] Ok Google options disappear if search provider is changed from

chrome/browser/resources/options/browser_options.js

 // Copyright (c) 2012 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.exportPath('options');
 
 /**
  * @typedef {{actionLinkText: (string|undefined),
  *            hasError: (boolean|undefined),
  *            hasUnrecoverableError: (boolean|undefined),
@@ skipping 1178 matching lines @@
      * @private
      */
     showHotwordNoDspSection_: function(opt_error) {
       this.showHotwordCheckboxAndIndicator_(
           'hotword-no-dsp-search',
           'hotword-no-dsp-search-setting-indicator',
           opt_error);
     },
 
     /**
+     * Controls the visibility of all the hotword sections.
+     * @param {boolean} visible Whether to show hotword sections.
+     * @private
+     */
+    setHotwordSectionVisible_: function(visible) {
+      $('hotword-search').hidden = !visible;
+      $('hotword-always-on-search').hidden = !visible;
+      $('hotword-no-dsp-search').hidden = !visible;
+      $('audio-history').hidden = !visible;
+    },
+
+    /**
      * Shows or hides the hotword retrain link
      * @param {boolean} visible Whether to show the link.
      * @private
      */
     setHotwordRetrainLinkVisible_: function(visible) {
       $('hotword-retrain-link').hidden = !visible;
     },
 
     /**
      * Event listener for the 'hotword always on search enabled' preference.
@@ skipping 897 matching lines @@
     'setAutoOpenFileTypesDisplayed',
     'setBatteryIcon',
     'setBatteryStatusText',
     'setBluetoothState',
     'setCanSetTime',
     'setFontSize',
     'setHotwordRetrainLinkVisible',
     'setNativeThemeButtonEnabled',
     'setNetworkPredictionValue',
     'setHighContrastCheckboxState',
+    'setHotwordSectionVisible',
     'setMetricsReportingCheckboxState',
     'setMetricsReportingSettingVisibility',
     'setProfilesInfo',
     'setSpokenFeedbackCheckboxState',
     'setThemesResetButtonEnabled',
     'setVirtualKeyboardCheckboxState',
     'setupPageZoomSelector',
     'setupProxySettingsButton',
     'showAudioHistorySection',
     'showBluetoothSettings',
@@ skipping 63 matching lines @@
       }
       button.textContent = loadTimeData.getString(strId);
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });