Give platform apps control over launcher right-click context menu.

chrome/browser/extensions/menu_manager.h

 // Copyright (c) 2012 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_MENU_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_MENU_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 53 matching lines @@
   enum Context {
     ALL = 1,
     PAGE = 2,
     SELECTION = 4,
     LINK = 8,
     EDITABLE = 16,
     IMAGE = 32,
     VIDEO = 64,
     AUDIO = 128,
     FRAME = 256,
+    LAUNCHER = 512
   };
 
   // An item can be only one of these types.
   enum Type {
     NORMAL,
     CHECKBOX,
     RADIO,
     SEPARATOR
   };
 
@@ skipping 261 matching lines @@
   ExtensionIconManager icon_manager_;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuManager);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_MENU_MANAGER_H_