Gallery.app: Don't dispatch an event to update when renaming is not done.

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.
 
 'use strict';
 
 /**
  * Called from the main frame when unloading.
  * @param {boolean=} opt_exiting True if the app is exiting.
  */
@@ skipping 756 matching lines @@
   if (item) {
     var oldEntry = item.getEntry();
 
     item.rename(this.filenameEdit_.value).then(function() {
       var event = new Event('content');
       event.item = item;
       event.oldEntry = oldEntry;
       event.metadata = null;  // Metadata unchanged.
       this.dataModel_.dispatchEvent(event);
     }.bind(this), function(error) {
+      if (error === 'NOT_CHANGED')
+        return;
       this.filenameEdit_.value =
           ImageUtil.getDisplayNameFromName(item.getEntry().name);
       this.filenameEdit_.focus();
       if (typeof error === 'string')
         this.prompt_.showStringAt('center', error, 5000);
       else
         return Promise.reject(error);
     }.bind(this)).catch(function(error) {
       console.error(error.stack || error);
     });
@@ skipping 177 matching lines @@
   window.loadTimeData.data = backgroundComponents.stringData;
   gallery = new Gallery(backgroundComponents.volumeManager);
 };
 
 /**
  * Loads entries.
  */
 window.loadEntries = function(entries, selectedEntries) {
   gallery.load(entries, selectedEntries);
 };