Add an ability for resize in gallery.

ui/file_manager/gallery/js/slide_mode.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.
 
 /**
  * Slide mode displays a single image and has a set of controls to navigate
  * between the images and to edit an image.
  *
  * @param {!HTMLElement} container Main container element.
  * @param {!HTMLElement} content Content container element.
@@ skipping 456 matching lines @@
 }
 
 /**
  * List of available editor modes.
  * @type {!Array<ImageEditor.Mode>}
  * @const
  */
 SlideMode.EDITOR_MODES = [
   new ImageEditor.Mode.InstantAutofix(),
   new ImageEditor.Mode.Crop(),
+  new ImageEditor.Mode.Resize(),
   new ImageEditor.Mode.Exposure(),
   new ImageEditor.Mode.OneClick(
       'rotate_left', 'GALLERY_ROTATE_LEFT', new Command.Rotate(-1)),
   new ImageEditor.Mode.OneClick(
       'rotate_right', 'GALLERY_ROTATE_RIGHT', new Command.Rotate(1))
 ];
 
 /**
  * Map of the key identifier and offset delta.
  * @enum {!Array<number>})
@@ skipping 1650 matching lines @@
 /**
  * Handles mouse up events.
  * @param {!Event} event Wheel event.
  * @private
  */
 TouchHandler.prototype.onMouseUp_ = function(event) {
   if (event.button !== 0)
     return;
   this.clickStarted_ = false;
 };