Remove pointless uses of EventInit

Source/core/html/track/TextTrackList.cpp

 /*
  * Copyright (C) 2011, 2012 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 290 matching lines @@
 void TextTrackList::scheduleChangeEvent()
 {
     // 4.8.10.12.1 Text track model
     // Whenever a text track that is in a media element's list of text tracks
     // has its text track mode change value, the user agent must run the
     // following steps for the media element:
     // ...
     // Fire a simple event named change at the media element's textTracks
     // attribute's TextTrackList object.
 
-    EventInit initializer;
-    initializer.bubbles = false;
-    initializer.cancelable = false;
-
-    m_asyncEventQueue->enqueueEvent(Event::create(EventTypeNames::change, initializer));
+    m_asyncEventQueue->enqueueEvent(Event::create(EventTypeNames::change));
 }
 
 void TextTrackList::scheduleRemoveTrackEvent(PassRefPtrWillBeRawPtr<TextTrack> track)
 {
     // 4.8.10.12.3 Sourcing out-of-band text tracks
     // When a track element's parent element changes and the old parent was a
     // media element, then the user agent must remove the track element's
     // corresponding text track from the media element's list of text tracks,
     // and then queue a task to fire a trusted event with the name removetrack,
     // that does not bubble and is not cancelable, and that uses the TrackEvent
@@ skipping 10 matching lines @@
 
 void TextTrackList::trace(Visitor* visitor)
 {
     visitor->trace(m_owner);
     visitor->trace(m_asyncEventQueue);
     visitor->trace(m_addTrackTracks);
     visitor->trace(m_elementTracks);
     visitor->trace(m_inbandTracks);
     EventTargetWithInlineData::trace(visitor);
 }