Add enable-app-shims to chrome://flags.

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 21 matching lines @@
    * the app that is currently showing a context menu stored in this.app_.
    * @constructor
    */
   function AppContextMenu() {
     this.__proto__ = AppContextMenu.prototype;
     this.initialize();
   }
   cr.addSingletonGetter(AppContextMenu);
 
   AppContextMenu.prototype = {
+    /**
+     * If true, the "Create shortcuts" context menu entry will be hidden.
+     * @type {boolean}
+     */
+    disableCreateAppShortcut: false,

[tapted, 2013/05/30 05:32:24]

pretty sure this should be in initialize(), with a this. and and underscore at
the end. i.e. (in initialize)

this.disableCreateAppShortcut_ = false;

Then, you'll need a function to set it, since it's "private"

+
     initialize: function() {
       var menu = new cr.ui.Menu;
       cr.ui.decorate(menu, cr.ui.Menu);
       menu.classList.add('app-context-menu');
       this.menu = menu;
 
       this.launch_ = this.appendMenuItem_();
       this.launch_.addEventListener('activate', this.onLaunch_.bind(this));
 
       menu.appendChild(cr.ui.MenuItem.createSeparator());
@@ skipping 14 matching lines @@
       this.options_ = this.appendMenuItem_('appoptions');
       this.details_ = this.appendMenuItem_('appdetails');
       this.uninstall_ = this.appendMenuItem_('appuninstall');
       this.options_.addEventListener('activate',
                                      this.onShowOptions_.bind(this));
       this.details_.addEventListener('activate',
                                      this.onShowDetails_.bind(this));
       this.uninstall_.addEventListener('activate',
                                        this.onUninstall_.bind(this));
 
-      if (!(cr.isChromeOS || cr.isMac)) {
+      if (!cr.isChromeOS) {
         this.createShortcutSeparator_ =
             menu.appendChild(cr.ui.MenuItem.createSeparator());
         this.createShortcut_ = this.appendMenuItem_('appcreateshortcut');
         this.createShortcut_.addEventListener(
             'activate', this.onCreateShortcut_.bind(this));
       }
 
       document.body.appendChild(menu);
     },
 
@@ skipping 46 matching lines @@
         launchTypeButton.checked = app.appData.launch_type == id;
         launchTypeButton.hidden = app.appData.packagedApp;
       });
 
       this.launchTypeMenuSeparator_.hidden = app.appData.packagedApp;
 
       this.options_.disabled = !app.appData.optionsUrl || !app.appData.enabled;
       this.details_.disabled = !app.appData.detailsUrl;
       this.uninstall_.disabled = !app.appData.mayDisable;
 
-      if (this.createShortcut_ && cr.isMac) {
+      if (cr.isMac) {
         // On Windows and Linux, these should always be visible. On ChromeOS,
         // they are never created. On Mac, shortcuts can only be created for
         // new-style packaged apps, so hide the menu item.
         this.createShortcutSeparator_.hidden = this.createShortcut_.hidden =
-            !app.appData.packagedApp;
+            !app.appData.packagedApp || this.disableCreateAppShortcut;
       }
     },
 
     /**
      * Handlers for menu item activation.
      * @param {Event} e The activation event.
      * @private
      */
     onLaunch_: function(e) {
       chrome.send('launchApp', [this.app_.appId, APP_LAUNCH.NTP_APPS_MENU]);
@@ skipping 383 matching lines @@
       this.classList.add('apps-page');
 
       this.addEventListener('cardselected', this.onCardSelected_);
 
       this.addEventListener('tilePage:tile_added', this.onTileAdded_);
 
       this.content_.addEventListener('scroll', this.onScroll_.bind(this));
     },
 
     /**
+     * Disable the "Create shortcut" context menu item.
+     */
+    disableCreateAppShortcut: function() {
+      AppContextMenu.getInstance().disableCreateAppShortcut = true;
+    },
+
+    /**
      * Highlight a newly installed app as it's added to the NTP.
      * @param {Object} appData The data object that describes the app.
      */
     insertAndHighlightApp: function(appData) {
       ntp.getCardSlider().selectCardByValue(this);
       this.content_.scrollTop = this.content_.scrollHeight;
       this.insertApp(appData, true);
     },
 
     /**
@@ skipping 187 matching lines @@
   function launchAppAfterEnable(appId) {
     chrome.send('launchApp', [appId, APP_LAUNCH.NTP_APP_RE_ENABLE]);
   }
 
   return {
     APP_LAUNCH: APP_LAUNCH,
     AppsPage: AppsPage,
     launchAppAfterEnable: launchAppAfterEnable,
   };
 });