Removed spaces, fixed local storage mechanism for first time visit

chrome/test/data/webrtc/manual/peerconnection_manual.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.
  */
 
  /**
  * See http://dev.w3.org/2011/webrtc/editor/getusermedia.html for more
  * information on getUserMedia. See
  * http://dev.w3.org/2011/webrtc/editor/webrtc.html for more information on
@@ skipping 1044 matching lines @@
  * @param {!string} element_id to be used as a key for local storage and the id
  *     of the element to store the state for.
  */
 function registerLocalStorage_(element_id) {
   var element = $(element_id);
   if (element.tagName != 'INPUT') {
     error_('You can only use registerLocalStorage_ for input elements. ' +
           'Element \"' + element.tagName + '\" is not an input element. ');
   }
 
-  if (localStorage.getItem(element.id) == 'undefined') {
+  if (localStorage.getItem(element.id) == null) {
     storeLocalStorageField_(element);
   } else {
     getLocalStorageField_(element);
   }
+
   // Registers the appropriate events for input elements.
   if (element.type == 'checkbox') {
     element.onclick = function() { storeLocalStorageField_(this); };
   } else if (element.type == 'text') {
     element.onblur = function() { storeLocalStorageField_(this); };
   } else {
     error_('Unsupportered input type: ' + '\"' + element.type + '\"');
   }
 }
 
@@ skipping 310 matching lines @@
 
 /** @private */
 function readResponseHeader_(request, key) {
   var value = request.getResponseHeader(key);
   if (value == null || value.length == 0) {
     error_('Received empty value ' + value +
            ' for response header key ' + key + '.');
   }
   return parseInt(value);
 }