[Hotword] Update helper extension to listen for change to audio logging preference.

chrome/browser/resources/hotword_helper/optin_client.js

Index: chrome/browser/resources/hotword_helper/optin_client.js
diff --git a/chrome/browser/resources/hotword_helper/optin_client.js b/chrome/browser/resources/hotword_helper/optin_client.js
index a688df76b9eb30159037a66f81eaa7ad2005976c..8ac22de318643af0fc7a724ed1c0b1ab9d946855 100644
--- a/chrome/browser/resources/hotword_helper/optin_client.js
+++ b/chrome/browser/resources/hotword_helper/optin_client.js
@@ -35,7 +35,11 @@ OptInClient.CommandFromPage = {
   // User has explicitly clicked 'no'.
   CLICKED_NO_OPTIN: 'hcno',
   // User has opted in.
-  CLICKED_OPTIN: 'hco'
+  CLICKED_OPTIN: 'hco',
+  // Audio logging is opted in.
+  AUDIO_LOGGING_ON: 'alon',
+  // Audio logging is opted out.
+  AUDIO_LOGGING_OFF: 'aloff',
 };
 
 
@@ -49,23 +53,15 @@ OptInClient.EXISTS_ = 'chwoihe';
 
 /**
  * Handles the messages posted to the window, mainly listening for
- * the optin and no optin clicks.
+ * the optin and no optin clicks. Also listening for preference on
+ * audio logging.
  * @param {!MessageEvent} messageEvent Message event from the window.
  * @private
  */
 OptInClient.prototype.handleCommandFromPage_ = function(messageEvent) {
   if (messageEvent.source === window && messageEvent.data.type) {
     var command = messageEvent.data.type;
-    switch (command) {
-      case OptInClient.CommandFromPage.CLICKED_OPTIN:
-        chrome.runtime.sendMessage(
-            {'type': command});
-        break;
-      case OptInClient.CommandFromPage.CLICKED_NO_OPTIN:
-        chrome.runtime.sendMessage(
-            {'type': command});
-        break;
-    }
+    chrome.runtime.sendMessage({'type': command});
   }
 };