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

chrome/browser/extensions/extension_prefs.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 17 matching lines @@
 
   typedef std::vector<linked_ptr<ExtensionInfo> > ExtensionsInfo;
 
   // This enum is used for the launch type the user wants to use for an
   // application.
   // Do not remove items or re-order this enum as it is used in preferences
   // and histograms.
   enum LaunchType {
     LAUNCH_PINNED,
     LAUNCH_REGULAR,
-    LAUNCH_FULLSCREEN
+    LAUNCH_FULLSCREEN,
+    LAUNCH_WINDOW
   };
 
   explicit ExtensionPrefs(PrefService* prefs, const FilePath& root_dir_);
   ~ExtensionPrefs();
 
   // Returns a copy of the Extensions prefs.
   // TODO(erikkay) Remove this so that external consumers don't need to be
   // aware of the internal structure of the preferences.
   DictionaryValue* CopyCurrentExtensions();
 
@@ skipping 218 matching lines @@
   // Base extensions install directory.
   FilePath install_directory_;
 
   // The URLs of all of the toolstrips.
   URLList shelf_order_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_