Use method registration approach for creating events on core and modules.

Source/core/Init.h

 /*
  * Copyright (C) 2013 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 20 matching lines @@
 #ifndef Init_h
 #define Init_h
 
 namespace WebCore {
 
 class CoreInitializer {
 public:
     CoreInitializer() : m_isInited(false) { }
     // Should be called by clients before trying to create Frames.
     void init();
+
+    virtual void registerEventFactory();
     virtual void initEventNames();
     virtual void initEventTargetNames();
 
 private:
     bool m_isInited;
 };
 
 void shutdown();
 
 } // namespace WebCore
 
 #endif // Init_h