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

chrome/browser/ui/webui/ntp/ntp_resource_cache.cc

 // 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.
 
 #include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
 
 #include <string>
 #include <vector>
 
 #include "apps/app_launcher.h"
@@ skipping 426 matching lines @@
       l10n_util::GetStringUTF16(IDS_NEW_TAB_PAGE_APPS_PROMO_TITLE));
   // On Mac OS X 10.7+, horizontal scrolling can be treated as a back or
   // forward gesture. Pass through a flag that indicates whether or not that
   // feature is enabled.
   load_time_data.SetBoolean("isSwipeTrackingFromScrollEventsEnabled",
                             is_swipe_tracking_from_scroll_events_enabled_);
   load_time_data.SetBoolean("showApps", should_show_apps_page_);
   load_time_data.SetBoolean("showWebStoreIcon",
                             !prefs->GetBoolean(prefs::kHideWebStoreIcon));
 
+#if defined(OS_MACOSX)
+  load_time_data.SetBoolean(
+      "disableCreateAppShortcut",
+      !CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableAppShims));
+#endif
+
 #if defined(OS_CHROMEOS)
   load_time_data.SetString("expandMenu",
       l10n_util::GetStringUTF16(IDS_NEW_TAB_CLOSE_MENU_EXPAND));
 #endif
 
   NewTabPageHandler::GetLocalizedValues(profile_, &load_time_data);
   NTPLoginHandler::GetLocalizedValues(profile_, &load_time_data);
 
   webui::SetFontAndTextDirection(&load_time_data);
 
@@ skipping 165 matching lines @@
   // Get our template.
   static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_NEW_TAB_4_THEME_CSS));
 
   // Create the string from our template and the replacements.
   std::string css_string;
   css_string = ReplaceStringPlaceholders(new_tab_theme_css, subst, NULL);
   new_tab_css_ = base::RefCountedString::TakeString(&css_string);
 }