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

Source/core/Init.cpp

 /*
  * 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 28 matching lines @@
 #include "HTMLNames.h"
 #include "HTMLTokenizerNames.h"
 #include "InputTypeNames.h"
 #include "MathMLNames.h"
 #include "MediaFeatureNames.h"
 #include "MediaTypeNames.h"
 #include "SVGNames.h"
 #include "XLinkNames.h"
 #include "XMLNSNames.h"
 #include "XMLNames.h"
+#include "core/dom/Document.h"
+#include "core/events/EventFactory.h"
 #include "core/html/parser/HTMLParserThread.h"
 #include "platform/EventTracer.h"
 #include "platform/Partitions.h"
 #include "platform/PlatformThreadData.h"
 #include "platform/heap/Heap.h"
 #include "wtf/text/StringStatics.h"
 
 namespace WebCore {
 
 void CoreInitializer::initEventNames()
 {
     EventNames::init();
 }
 
 void CoreInitializer::initEventTargetNames()
 {
     EventTargetNames::init();
 }
 
+void CoreInitializer::registerEventFactory()
+{
+    static bool isRegistered = false;
+    if (isRegistered)
+        return;
+    isRegistered = true;
+
+    Document::registerEventFactory(new EventFactory());
+}
+
 void CoreInitializer::init()
 {
     if (m_isInited)
         return;
     m_isInited = true;
 
     // It would make logical sense to do this and WTF::StringStatics::init() in
     // WTF::initialize() but there are ordering dependencies.
     AtomicString::init();
     HTMLNames::init();
@@ skipping 11 matching lines @@
     HTMLTokenizerNames::init();
     InputTypeNames::init();
     MediaFeatureNames::init();
     MediaTypeNames::init();
 
     WTF::StringStatics::init();
     QualifiedName::init();
     Partitions::init();
     EventTracer::initialize();
 
+    registerEventFactory();
+
     // Ensure that the main thread's thread-local data is initialized before
     // starting any worker threads.
     PlatformThreadData::current();
 
     StringImpl::freezeStaticStrings();
 
     // Creates HTMLParserThread::shared, but does not start the thread.
     HTMLParserThread::init();
 }
 
 void shutdown()
 {
     // Make sure we stop the HTMLParserThread before Platform::current() is cleared.
     HTMLParserThread::shutdown();
 
     Partitions::shutdown();
 }
 
 } // namespace WebCore