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

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

Index: chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
diff --git a/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc b/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
index 19516330eb62082ec17aa70965c49cb04956ba90..fc801ceb929e9523bf4294f6e2b8ce0c215dbe43 100644
--- a/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
+++ b/chrome/browser/ui/webui/ntp/ntp_resource_cache.cc
@@ -444,6 +444,12 @@ void NTPResourceCache::CreateNewTabHTML() {
   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));