DevTools: Add support for adding folders to workspace with drag and drop (renderer part)

Source/core/inspector/InspectorFrontendHost.h

 /*
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 53 matching lines @@
 
     // Called from [Custom] implementations.
     void showContextMenu(Event*, const Vector<ContextMenuItem>& items);
     void sendMessageToBackend(const String& message);
     void sendMessageToEmbedder(const String& message);
 
     String getSelectionBackgroundColor();
     String getSelectionForegroundColor();
 
     PassRefPtr<DOMFileSystem> isolatedFileSystem(const String& fileSystemName, const String& rootURL);
+    void upgradeDraggedFileSystemPermissions(DOMFileSystem*);
 
     bool isUnderTest();
 
 private:
     friend class FrontendMenuProvider;
     InspectorFrontendHost(InspectorFrontendClient* client, Page* frontendPage);
 
     InspectorFrontendClient* m_client;
     Page* m_frontendPage;
     FrontendMenuProvider* m_menuProvider;
 };
 
 } // namespace WebCore
 
 #endif // !defined(InspectorFrontendHost_h)