Fix duplicated images when editing pictures.

chrome/browser/resources/file_manager/foreground/js/photo/slide_mode.js

 // Copyright (c) 2012 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';
 
 /**
  * Slide mode displays a single image and has a set of controls to navigate
  * between the images and to edit an image.
  *
@@ skipping 961 matching lines @@
         // Allow changing the 'Overwrite original' setting only if the user
         // used Undo to restore the original image AND it is not a copy.
         // Otherwise lock the setting in its current state.
         var mayChangeOverwrite = !this.editor_.canUndo() && item.isOriginal();
         ImageUtil.setAttribute(this.options_, 'saved', !mayChangeOverwrite);
 
         if (this.imageView_.getContentRevision() === 1) {  // First edit.
           ImageUtil.metrics.recordUserAction(ImageUtil.getMetricName('Edit'));
         }
 
-        if (util.isSameEntry(oldEntry, item.getEntry())) {
+        if (!util.isSameEntry(oldEntry, item.getEntry())) {
           this.dataModel_.splice(
               this.getSelectedIndex(), 0, new Gallery.Item(oldEntry));
           // The ribbon will ignore the splice above and redraw after the
           // select call below (while being obscured by the Editor toolbar,
           // so there is no need for nice animation here).
           // SlideMode will ignore the selection change as the displayed item
           // index has not changed.
           this.select(++this.displayedIndex_);
         }
         callback();
@@ skipping 352 matching lines @@
       done = true;
     }
   }.bind(this);
 };
 
 /**
  * If the user touched the image and moved the finger more than SWIPE_THRESHOLD
  * horizontally it's considered as a swipe gesture (change the current image).
  */
 SwipeOverlay.SWIPE_THRESHOLD = 100;