Add a trivial logging wrapper around console.log, and add some useful log

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 dfe4c7ef860388f86c02b934f2a01e6a28ff7ff0..0fc364b428fc63630828edd15d145da83c08b4a8 100644
--- a/chrome/browser/resources/hotword/manager.js
+++ b/chrome/browser/resources/hotword/manager.js
@@ -33,12 +33,15 @@
   // Detect when the shared module containing the NaCL module and language model
   // is installed.
   chrome.management.onInstalled.addListener(function(info) {
-    if (info.id == hotword.constants.SHARED_MODULE_ID)
+    if (info.id == hotword.constants.SHARED_MODULE_ID) {
+      hotword.debug('Shared module installed, reloading extension.');
       chrome.runtime.reload();
+    }
   });
 
   // Detect when a session has requested to be started and stopped.
   chrome.hotwordPrivate.onHotwordSessionRequested.addListener(function() {
+    hotword.debug('hotwordPrivate.onHotwordSessionRequested');
     // TODO(amistry): This event should change state depending on whether the
     // user has enabled always-on hotwording. But for now, always signal the
     // start of a hotwording session. This allows this extension to work with
@@ -51,6 +54,7 @@
   });
 
   chrome.hotwordPrivate.onHotwordSessionStopped.addListener(function() {
+    hotword.debug('hotwordPrivate.onHotwordSessionStopped');
     stateManager.stopSession(hotword.constants.SessionSource.LAUNCHER);
     chrome.hotwordPrivate.setHotwordSessionState(false, function() {});
   });