Toggling 'Open in a tab' now works for hosted apps on chrome://apps page.

chrome/browser/resources/ntp4/apps_page.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.
 
 cr.define('ntp', function() {
   'use strict';
 
   var APP_LAUNCH = {
     // The histogram buckets (keep in sync with extension_constants.h).
     NTP_APPS_MAXIMIZED: 0,
@@ skipping 36 matching lines @@
 
       this.launch_ = this.appendMenuItem_();
       this.launch_.addEventListener('activate', this.onLaunch_.bind(this));
 
       menu.appendChild(cr.ui.MenuItem.createSeparator());
       if (loadTimeData.getBoolean('enableStreamlinedHostedApps'))
         this.launchRegularTab_ = this.appendMenuItem_('applaunchtypetab');
       else
         this.launchRegularTab_ = this.appendMenuItem_('applaunchtyperegular');
       this.launchPinnedTab_ = this.appendMenuItem_('applaunchtypepinned');
-      if (!cr.isMac)
-        this.launchNewWindow_ = this.appendMenuItem_('applaunchtypewindow');
+      this.launchNewWindow_ = this.appendMenuItem_('applaunchtypewindow');
       this.launchFullscreen_ = this.appendMenuItem_('applaunchtypefullscreen');
 
       var self = this;
       this.forAllLaunchTypes_(function(launchTypeButton, id) {
         launchTypeButton.addEventListener('activate',
             self.onLaunchTypeChanged_.bind(self));
       });
 
       this.launchTypeMenuSeparator_ = cr.ui.MenuItem.createSeparator();
       menu.appendChild(this.launchTypeMenuSeparator_);
@@ skipping 701 matching lines @@
   function launchAppAfterEnable(appId) {
     chrome.send('launchApp', [appId, APP_LAUNCH.NTP_APP_RE_ENABLE]);
   }
 
   return {
     APP_LAUNCH: APP_LAUNCH,
     AppsPage: AppsPage,
     launchAppAfterEnable: launchAppAfterEnable,
   };
 });