ScriptController: limit script execution API to executeScript and callFunction, pass valid ScriptEx…

Source/bindings/v8/ScriptFunctionCall.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
         String m_name;
     };
 
     class ScriptCallback : public ScriptCallArgumentHandler {
     public:
         ScriptCallback(ScriptState*, const ScriptValue&);
 
         ScriptValue call();
 
     private:
+        ScriptState* m_scriptState;
         ScriptValue m_function;
     };
 
 } // namespace WebCore
 
 #endif // ScriptFunctionCall