Add an ability for resize in gallery.

ui/file_manager/gallery/js/gallery.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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
@@ skipping 758 matching lines @@
   // Handle mode specific shortcut keys.
   if (this.currentMode_.onKeyDown(event)) {
     event.preventDefault();
     return;
   }
 
   // Handle application wide shortcut keys.
   switch (keyString) {
     case 'Backspace':
       // The default handler would call history.back and close the Gallery.
+      // Except while typing into text.
+      if(!event.target.classList.contains('text'))
       event.preventDefault();

[fukino, 2016/08/31 05:10:24]

indent is needed

[harukam, 2016/09/05 10:37:00]

Done.

       break;
 
     case 'm':  // 'm' switches between Slide and Mosaic mode.
       if (!this.modeSwitchButton_.disabled)
         this.toggleMode_(undefined, event);
       break;
 
     case 'v':
     case 'MediaPlayPause':
       if (!this.slideshowButton_.disabled) {
@@ skipping 270 matching lines @@
  */
 var initializePromise =
     Promise.all([loadTimeDataPromise, volumeManagerPromise]).
     then(function(args) {
       var volumeManager = args[1];
       gallery = new Gallery(volumeManager);
     });
 
 // Loads entries.
 initializePromise.then(reload);