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

chrome/browser/extensions/api/context_menu/context_menu_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/context_menu/context_menu_api.h"
 
 #include <string>
 
 #include "base/values.h"
 #include "base/string_number_conversions.h"
@@ skipping 57 matching lines @@
         break;
       case PropertyWithEnumT::CONTEXTS_ELEMENT_VIDEO:
         contexts.Add(extensions::MenuItem::VIDEO);
         break;
       case PropertyWithEnumT::CONTEXTS_ELEMENT_AUDIO:
         contexts.Add(extensions::MenuItem::AUDIO);
         break;
       case PropertyWithEnumT::CONTEXTS_ELEMENT_FRAME:
         contexts.Add(extensions::MenuItem::FRAME);
         break;
+      case PropertyWithEnumT::CONTEXTS_ELEMENT_LAUNCHER:
+        contexts.Add(extensions::MenuItem::LAUNCHER);
+        break;
     }
   }
   return contexts;
 }
 
 template<typename PropertyWithEnumT>
 extensions::MenuItem::Type GetType(const PropertyWithEnumT& property) {
   switch (property.type) {
     case PropertyWithEnumT::TYPE_NONE:
     case PropertyWithEnumT::TYPE_NORMAL:
@@ skipping 274 matching lines @@
 
 bool RemoveAllContextMenusFunction::RunImpl() {
   ExtensionService* service = profile()->GetExtensionService();
   MenuManager* manager = service->menu_manager();
   manager->RemoveAllContextItems(GetExtension()->id());
   manager->WriteToStorage(GetExtension());
   return true;
 }
 
 }  // namespace extensions