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

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 77 matching lines @@
 class DocumentLifecycleObserver;
 class DocumentLoader;
 class DocumentMarkerController;
 class DocumentParser;
 class DocumentState;
 class AnimationTimeline;
 class DocumentType;
 class Element;
 class ElementDataCache;
 class Event;
+class EventFactoryBase;
 class EventListener;
 class ExceptionState;
 class FastTextAutosizer;
 class FloatQuad;
 class FloatRect;
 class FontFaceSet;
 class FormController;
 class Frame;
 class FrameHost;
 class FrameView;
@@ skipping 579 matching lines @@
     void didMergeTextNodes(Text& oldNode, unsigned offset);
     void didSplitTextNode(Text& oldNode);
 
     void clearDOMWindow() { m_domWindow = nullptr; }
     DOMWindow* domWindow() const { return m_domWindow; }
 
     // Helper functions for forwarding DOMWindow event related tasks to the DOMWindow if it exists.
     void setWindowAttributeEventListener(const AtomicString& eventType, PassRefPtr<EventListener>);
     EventListener* getWindowAttributeEventListener(const AtomicString& eventType);
 
+    static void registerEventFactory(EventFactoryBase*);
     static PassRefPtrWillBeRawPtr<Event> createEvent(const String& eventType, ExceptionState&);
 
     // keep track of what types of event listeners are registered, so we don't
     // dispatch events unnecessarily
     enum ListenerType {
         DOMSUBTREEMODIFIED_LISTENER          = 1,
         DOMNODEINSERTED_LISTENER             = 1 << 1,
         DOMNODEREMOVED_LISTENER              = 1 << 2,
         DOMNODEREMOVEDFROMDOCUMENT_LISTENER  = 1 << 3,
         DOMNODEINSERTEDINTODOCUMENT_LISTENER = 1 << 4,
@@ skipping 468 matching lines @@
     void processHttpEquivDefaultStyle(const AtomicString& content);
     void processHttpEquivRefresh(const AtomicString& content);
     void processHttpEquivSetCookie(const AtomicString& content);
     void processHttpEquivXFrameOptions(const AtomicString& content);
     void processHttpEquivContentSecurityPolicy(const AtomicString& equiv, const AtomicString& content);
 
     void didRemoveTouchEventHandler(Node*, bool clearAll);
 
     bool haveStylesheetsLoaded() const;
 
+    typedef HashSet<EventFactoryBase*> EventFactorySet;
+    static EventFactorySet& eventFactories();
+
     DocumentLifecycle m_lifecycle;
 
     bool m_hasNodesWithPlaceholderStyle;
     bool m_evaluateMediaQueriesOnStyleRecalc;
 
     // If we do ignore the pending stylesheet count, then we need to add a boolean
     // to track that this happened so that we can do a full repaint when the stylesheets
     // do eventually load.
     PendingSheetLayout m_pendingSheetLayout;
 
@@ skipping 249 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h