Random clean up around Chrome OS file manager code.

ui/file_manager/video_player/js/cast/cast_video_element.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';
 
 /**
- * Inverval for updating media info (in ms).
+ * Interval for updating media info (in ms).
  * @type {number}
  * @const
  */
 var MEDIA_UPDATE_INTERVAL = 250;
 
 /**
  * The namespace for communication between the cast and the player.
  * @type {string}
  * @const
  */
@@ skipping 93 matching lines @@
    * @type {boolean}
    */
   get ended() {
     if (!this.castMedia_)
       return true;
 
    return this.castMedia_.idleReason === chrome.cast.media.IdleReason.FINISHED;
   },
 
   /**
-   * If this video is seelable or not.
+   * If this video is seekable or not.
    * @type {boolean}
    */
   get seekable() {
     // TODO(yoshiki): Support seek.
     return false;
   },
 
   /**
    * Value of the volume
    * @type {number}
@@ skipping 274 matching lines @@
       this.dispatchEvent(new Event('durationchange'));
     }
 
     // Media is being unloaded.
     if (!alive) {
       this.unloadMedia_();
       return;
     }
   },
 };