Improve web-app type safety.

remoting/webapp/me2mom/l10n.js

 /* Copyright (c) 2011 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.
  */
 
 var l10n = l10n || {};
 
 /**
  * Localize an element by setting its innerText according to the specified tag
  * and an optional set of substitutions.
@@ skipping 26 matching lines @@
   return l10n.localizeElementFromTag(element, tag, opt_substitutions);
 };
 
 /**
  * Localize all tags with the i18n-content attribute, using i18n-data-n
  * attributes to specify any placeholder substitutions.
  */
 l10n.localize = function() {
   var elements = document.querySelectorAll('[i18n-content]');
   for (var i = 0; i < elements.length; ++i) {
-    var element = elements[i];
+    /** @type {Element} */ var element = elements[i];
     var substitutions = null;
     for (var j = 1; j < 9; ++j) {
       var attr = 'i18n-value-' + j;
       if (element.hasAttribute(attr)) {
         if (!substitutions) {
           substitutions = [];
         }
         substitutions.push(element.getAttribute(attr));
       } else {
         break;
       }
     }
     l10n.localizeElement(element, substitutions);
   }
 };