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

chrome/browser/extensions/extension_toolbar_model.cc

Index: chrome/browser/extensions/extension_toolbar_model.cc
diff --git a/chrome/browser/extensions/extension_toolbar_model.cc b/chrome/browser/extensions/extension_toolbar_model.cc
index 9b36825416cd6c0119b0c2d511050ab0f7818e96..7d31043ba134370c7fcd5c31e4987f79167868bf 100644
--- a/chrome/browser/extensions/extension_toolbar_model.cc
+++ b/chrome/browser/extensions/extension_toolbar_model.cc
@@ -90,9 +90,6 @@ void ExtensionToolbarModel::Observe(NotificationType type,
     return;
   }
 
-  if (!service_->is_ready())
-    return;
-
   const Extension* extension = Details<const Extension>(details).ptr();
   if (type == NotificationType::EXTENSION_LOADED) {
     AddExtension(extension);
@@ -151,8 +148,6 @@ void ExtensionToolbarModel::RemoveExtension(const Extension* extension) {
 // 2. Create a vector of extensions that did not have a pref value.
 // 3. Remove holes from the sorted vector and append the unsorted vector.
 void ExtensionToolbarModel::InitializeExtensionList() {
-  DCHECK(service_->is_ready());
-
   std::vector<std::string> pref_order = service_->extension_prefs()->
       GetToolbarOrder();
   // Items that have a pref for their position.