Nitpicking fixes for Files.app code.

ui/file_manager/video_player/js/error_util.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.
 
 'use strict';
 
 /**
  * This variable is checked in SelectFileDialogExtensionBrowserTest.
  * @type {number}
  */
 window.JSErrorCount = 0;
 
 /**
  * Counts uncaught exceptions.
  */
 window.onerror = function() { window.JSErrorCount++; };
 
 /**
  * Wraps the function to use it as a callback.
  * This does:
  *  - Capture the stack trace in case of error.
  *  - Bind this object
  *
  * @param {Object} thisObject Object to be used as this.
- * @return {function} Wapped function.
+ * @return {function} Wrapped function.
  */
 Function.prototype.wrap = function(thisObject) {
   var func = this;
   var liveStack = (new Error('Stack trace before async call')).stack;
   if (thisObject === undefined)
     thisObject = null;
 
   return function wrappedCallback() {
     try {
       return func.apply(thisObject, arguments);
     } catch (e) {
       console.error('Exception happens in callback.', liveStack);
 
       window.JSErrorCount++;
       throw e;
     }
   }
 };