Hotword: Check for the existence of a speaker model.

chrome/browser/resources/hotword/manager.js

Index: chrome/browser/resources/hotword/manager.js
diff --git a/chrome/browser/resources/hotword/manager.js b/chrome/browser/resources/hotword/manager.js
index 3f092dc6dea7be8854694a5340951d3533384b91..d186a3f424b2ef9d7dc615277487fce700c69553 100644
--- a/chrome/browser/resources/hotword/manager.js
+++ b/chrome/browser/resources/hotword/manager.js
@@ -39,6 +39,11 @@
     hotword.TrainingManager.handleDeleteSpeakerModel();
   });
 
+  // Detect a request for the speaker model existence.
+  chrome.hotwordPrivate.onSpeakerModelExists.addListener(function() {
+    hotword.TrainingManager.handleSpeakerModelExists();
+  });
+
   // Detect when the shared module containing the NaCL module and language model
   // is installed.
   chrome.management.onInstalled.addListener(function(info) {