Gallery: Random fixes for the Viewport class.

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 121 matching lines @@
       this.left = 0;
       this.top = 0;
       this.width = 0;
       this.height = 0;
       return;
   }
   console.error('Invalid Rect constructor arguments:',
        Array.apply(null, arguments));
 }
 
+Rect.prototype = {
+  /**
+   * Obtains the x coordinate of right edge. The most right pixels in the
+   * 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
+   * in the rectangle.
+   * @return {number}
+   */
+  get bottom() {
+    return this.top + this.height;
+  }
+};
+
 /**
  * @param {number} factor Factor to scale.
  * @return {Rect} A rectangle with every dimension scaled.
  */
 Rect.prototype.scale = function(factor) {
   return new Rect(
       this.left * factor,
       this.top * factor,
       this.width * factor,
       this.height * factor);
@@ skipping 511 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'];