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

chrome/browser/resources/hotword/manager.js

 // Copyright 2014 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.
 
 (function() {
   'use strict';
 
   /**
    * @fileoverview This extension provides hotword triggering capabilites to
    * Chrome.
@@ skipping 15 matching lines @@
   });
 
   // Detect when hotword settings have changed.
   chrome.hotwordPrivate.onEnabledChanged.addListener(function() {
     stateManager.updateStatus();
   });
 
   // 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
     // the app launcher in the current state.
     stateManager.startSession(
         hotword.constants.SessionSource.LAUNCHER,
         function() {
           chrome.hotwordPrivate.setHotwordSessionState(true, function() {});
         });
   });
 
   chrome.hotwordPrivate.onHotwordSessionStopped.addListener(function() {
+    hotword.debug('hotwordPrivate.onHotwordSessionStopped');
     stateManager.stopSession(hotword.constants.SessionSource.LAUNCHER);
     chrome.hotwordPrivate.setHotwordSessionState(false, function() {});
   });
 }());