Random clean up around Chrome OS file manager code.

ui/file_manager/gallery/js/image_editor/image_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';
 
 
 // Namespace object for the utilities.
 function ImageUtil() {}
 
@@ skipping 134 matching lines @@
    * rectangle are (x = right - 1) and the pixels (x = right) are not included
    * in the rectangle.
    * @return {number}
    */
   get right() {
     return this.left + this.width;
   },
 
   /**
    * Obtains the y coordinate of bottom edge. The most bottom pixels in the
-   * rectanlge are (y = buttom - 1) and the pixels (y = bottom) are not included
+   * rectangle are (y = bottom - 1) and the pixels (y = bottom) are not included
    * in the rectangle.
    * @return {number}
    */
   get bottom() {
     return this.top + this.height;
   }
 };
 
 /**
  * @param {number} factor Factor to scale.
@@ skipping 519 matching lines @@
  * @return {string} Full name.
  */
 ImageUtil.getMetricName = function(name) {
   return 'PhotoEditor.' + name;
 };
 
 /**
  * Used for metrics reporting, keep in sync with the histogram description.
  */
 ImageUtil.FILE_TYPES = ['jpg', 'png', 'gif', 'bmp', 'webp'];