Add "create Application Shortcut" to the app menu on NTP.

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 140 matching lines @@
   // Returns true if the user enabled this extension to be loaded in incognito
   // mode.
   bool IsIncognitoEnabled(const std::string& extension_id);
   void SetIsIncognitoEnabled(const std::string& extension_id, bool enabled);
 
   // Returns true if the user has chosen to allow this extension to inject
   // scripts into pages with file URLs.
   bool AllowFileAccess(const std::string& extension_id);
   void SetAllowFileAccess(const std::string& extension_id, bool allow);
 
-  ExtensionPrefs::LaunchType GetLaunchType(const std::string& extension_id);
+  // Get the launch type preference.  If no preference is set, return
+  // |default_pref_value|.
+  LaunchType GetLaunchType(const std::string& extension_id,
+                           LaunchType default_pref_value);
+
   void SetLaunchType(const std::string& extension_id, LaunchType launch_type);
 
+  // Find the right launch container based on the launch type.
+  // If |extension|'s prefs do not have a launch type set, then
+  // use |default_pref_value|.
+  extension_misc::LaunchContainer GetLaunchContainer(
+      const Extension* extension,
+      LaunchType default_pref_value);
+
+
   // Saves ExtensionInfo for each installed extension with the path to the
   // version directory and the location. Blacklisted extensions won't be saved
   // and neither will external extensions the user has explicitly uninstalled.
   // Caller takes ownership of returned structure.
   ExtensionsInfo* GetInstalledExtensionsInfo();
 
   // Returns the ExtensionInfo from the prefs for the given extension. If the
   // extension is not present, NULL is returned.
   ExtensionInfo* GetInstalledExtensionInfo(const std::string& extension_id);
 
@@ skipping 133 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_