Hotword Audio Verification app: control the hotword settings

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
diff --git a/chrome/browser/resources/options/browser_options.js b/chrome/browser/resources/options/browser_options.js
index c7bcb147c8cd40ab170006dd21461063323f6249..2419b9603657d7b1bfba4faad340b76222fd1da5 100644
--- a/chrome/browser/resources/options/browser_options.js
+++ b/chrome/browser/resources/options/browser_options.js
@@ -220,6 +220,19 @@ cr.define('options', function() {
         };
       }
 
+      // Control the hotword-always-on pref with the Hotword Audio
+      // Verification app.
+      $('hotword-always-on-search-checkbox').customChangeHandler =
+          function(event) {
+        if (($('hotword-always-on-search-checkbox').checked)) {
+          $('hotword-always-on-search-checkbox').checked = false;

[rpetterson, 2014/09/11 20:14:17]

Does setting checked to false actually update the preference so that it's not
set? I'm not as familiar with exactly when checkboxes update the preference
based their handlers.

[kcarattini, 2014/09/12 01:02:07]

My understanding is that this function is called after the checkbox is checked
but before the pref is updated. Returning true stops the pref from being set.
See
https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/res...

+          chrome.send('launchHotwordAudioVerificationApp', [Boolean(false)]);
+          return true;
+        } else {
+          return false;
+        }
+      };
+
       $('themes-gallery').onclick = function(event) {
         window.open(loadTimeData.getString('themesGalleryURL'));
         chrome.send('coreOptionsUserMetricsAction',