Add the new window item to the Files.app's context menu on the launcher.

chrome/browser/resources/file_manager/js/file_manager.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';
 
 /**
  * This variable is checked in SelectFileDialogExtensionBrowserTest.
  * @type {number}
  */
@@ skipping 607 matching lines @@
     var commands = this.dialogDom_.querySelectorAll('command');
     for (var i = 0; i < commands.length; i++)
       cr.ui.Command.decorate(commands[i]);
 
     var doc = this.document_;
 
     CommandUtil.registerCommand(doc, 'newfolder',
         Commands.newFolderCommand, this, this.directoryModel_);
 
     CommandUtil.registerCommand(doc, 'newwindow',
-        Commands.newWindowCommand, this);
+        Commands.newWindowCommand, this, this.directoryModel_);
 
     CommandUtil.registerCommand(doc, 'change-default-app',
         Commands.changeDefaultAppCommand, this);
 
     CommandUtil.registerCommand(this.volumeList_, 'unmount',
         Commands.unmountCommand, this.volumeList_, this);
 
     CommandUtil.registerCommand(this.volumeList_, 'import-photos',
         Commands.importCommand, this.volumeList_);
 
@@ skipping 144 matching lines @@
     callback();
   };
 
   /**
    * One time initialization of strings (mostly i18n).
    *
    * @param {function()} callback Completion callback.
    * @private
    */
   FileManager.prototype.initStrings_ = function(callback) {
-    chrome.fileBrowserPrivate.getStrings(function(strings) {
-      loadTimeData.data = strings;
-      this.loadTimeDataAvailable = true;
-      callback();
-    });
+    // Fetch the strings via the private api if running in the browser window.
+    // Otherwise, read cached strings from the local storage.
+    if (util.platform.runningInBrowser()) {
+      chrome.fileBrowserPrivate.getStrings(function(strings) {
+        loadTimeData.data = strings;
+        callback();
+      });
+    } else {
+      chrome.storage.local.get('strings', function(items) {
+        loadTimeData.data = items['strings'];
+        callback();
+      });
+    }
   };
 
   /**
    * One time initialization of the Files.app's essential UI elements. These
    * elements will be shown to the user. Only visible elements should be
    * initialized here. Any heavy operation should be avoided. Files.app's
    * window is shown at the end of this routine.
    *
    * @param {function()} callback Completion callback.
    * @private
@@ skipping 3000 matching lines @@
    * Set the flag expressing whether the ctrl key is pressed or not.
    * @param {boolean} flag New value of the flag
    * @private
    */
   FileManager.prototype.setCtrlKeyPressed_ = function(flag) {
     this.ctrlKeyPressed_ = flag;
     this.document_.querySelector('#drive-clear-local-cache').canExecuteChange();
     this.document_.querySelector('#drive-reload').canExecuteChange();
   };
 })();