[NaCl SDK] Make the SDK examples buildable as a packaged app.

native_client_sdk/src/examples/dlopen/example.js

 // Copyright (c) 2012 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.
 
 // Called by the common.js module.
 function attachListeners() {
   document.querySelector('form').addEventListener('submit', askBall);
   document.getElementById('reverse').addEventListener('click', reverseString);
 }
 
 // Called by the common.js module.
 function moduleDidLoad() {
   // The module is not hidden by default so we can easily see if the plugin
   // failed to load.
   common.hideModule();
 }
 
 function askBall(event) {
   var questionEl = document.getElementById('question');
   var query = questionEl.value;
   questionEl.value = '';
-  document.getElementById('log').innerHTML += 'You asked:' + query + '<br>';
+  common.logMessage('You asked: ' + query + '\n');
   common.naclModule.postMessage('eightball');
   event.preventDefault();
 }
 
 function reverseString(event) {
   var questionEl = document.getElementById('question');
   var query = questionEl.value;
   questionEl.value = '';
-
-  document.getElementById('log').innerHTML += 'Reversing:' + query + '<br>';
+  common.logMessage('Reversing: ' + query + '\n');
   common.naclModule.postMessage('reverse:' + query);
 }