Drop TrackDisplayUpdateScope in HTMLMediaElement::removeTextTrack

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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 2335 matching lines @@
 
 void HTMLMediaElement::addTextTrack(TextTrack* track)
 {
     textTracks()->append(track);
 
     textTracksChanged();
 }
 
 void HTMLMediaElement::removeTextTrack(TextTrack* track)
 {
-    TrackDisplayUpdateScope scope(this->cueTimeline());
     m_textTracks->remove(track);
 
     textTracksChanged();
 }
 
 void HTMLMediaElement::forgetResourceSpecificTracks()
 {
     // Implements the "forget the media element's media-resource-specific tracks" algorithm.
     // The order is explicitly specified as text, then audio, and finally video. Also
     // 'removetrack' events should not be fired.
@@ skipping 1234 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!visitor->isAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(nullptr);
 }
 #endif
 
 }