InitEvent should not do anything if dispatch flag is set.

third_party/WebKit/Source/core/events/TextEvent.cpp

 /*
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 71 matching lines @@
     , m_shouldMatchStyle(shouldMatchStyle)
 {
 }
 
 TextEvent::~TextEvent()
 {
 }
 
 void TextEvent::initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, AbstractView* view, const String& data)
 {
-    if (dispatched())
+    if (isBeingDispatched())
         return;
 
     initUIEvent(type, canBubble, cancelable, view, 0);
 
     m_data = data;
 }
 
 const AtomicString& TextEvent::interfaceName() const
 {
     return EventNames::TextEvent;
 }
 
 DEFINE_TRACE(TextEvent)
 {
     visitor->trace(m_pastingFragment);
     UIEvent::trace(visitor);
 }
 
 } // namespace blink