Remove virtual where not needed in TextTrackCue

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 774 matching lines @@
         return;
     m_videoDisplaySize = videoBox;
 
     float smallestDimension = std::min(m_videoDisplaySize.size().height(), m_videoDisplaySize.size().width());
 
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
-
-    CueList activeCues = mediaElement->currentlyActiveCues();
-    for (size_t i = 0; i < activeCues.size(); ++i) {
-        TextTrackCue* cue = activeCues[i].data();
-        cue->videoSizeDidChange(m_videoDisplaySize.size());
-    }
 }
 
 // ----------------------------
 
 } // namespace WebCore