Add "open as window" menu item to NTP app menu.

chrome/browser/extensions/extension_dom_ui.cc

Index: chrome/browser/extensions/extension_dom_ui.cc
diff --git a/chrome/browser/extensions/extension_dom_ui.cc b/chrome/browser/extensions/extension_dom_ui.cc
index c0522f0c60a567bb2f541a9568b19c3021e31ade..faaa74b2debb51e53cd535cfced9a2641824c9bf 100644
--- a/chrome/browser/extensions/extension_dom_ui.cc
+++ b/chrome/browser/extensions/extension_dom_ui.cc
@@ -243,13 +243,6 @@ bool ExtensionDOMUI::HandleChromeURLOverride(GURL* url, Profile* profile) {
     return false;
 
   ExtensionsService* service = profile->GetExtensionsService();
-  if (!service->is_ready()) {
-    // TODO(erikkay) So far, it looks like extensions load before the new tab
-    // page.  I don't know if we have anything that enforces this, so add this
-    // check for safety.
-    NOTREACHED() << "Chrome URL override requested before extensions loaded";
-    return false;
-  }
 
   size_t i = 0;
   while (i < url_list->GetSize()) {