Gallery.app: Remove old Gallery files.

ui/file_manager/gallery/js/background.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';
 
 /**
  * @param {Object.<string, string>} stringData String data.
  * @param {VolumeManager} volumeManager Volume manager.
  */
@@ skipping 124 matching lines @@
           allEntries: args[1]
         });
       });
 
   // Close previous window.
   var closePromise;
   if (appWindowPromise) {
     closePromise = appWindowPromise.then(function(appWindow) {
       return new Promise(function(fulfill) {
         appWindow.close();
-        appWindow.onClosed.addListener(fulfill);
+        try {
+          appWindow.onClosed.addListener(fulfill);
+        } catch (error) {
+          // Sometimes it failes to addListener.

[yoshiki, 2014/05/23 06:16:13]

The handler should be registered before closing it.

[hirono, 2014/05/26 02:21:48]

Done.

+          fulfill();
+        }
       });
     });
   } else {
     closePromise = Promise.resolve();
   }
   var createdWindowPromise = closePromise.then(function() {
     return new Promise(function(fulfill) {
       chrome.app.window.create(
           'gallery.html',
           {
@@ skipping 20 matching lines @@
   Promise.all([
     appWindowPromise,
     allEntriesPromise,
     selectedEntriesPromise
   ]).then(function(args) {
     args[0].contentWindow.loadEntries(args[1], args[2]);
   }).catch(function(error) {
     console.error(error.stack || error);
   });
 });