Remove unused show/hideTextTrackDisplay()

Source/core/html/shadow/MediaControls.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 510 matching lines @@
     if (m_textDisplayContainer)
         return;
 
     RefPtrWillBeRawPtr<MediaControlTextTrackContainerElement> textDisplayContainer = MediaControlTextTrackContainerElement::create(*this);
     m_textDisplayContainer = textDisplayContainer.get();
 
     // Insert it before (behind) all other control elements.
     m_overlayEnclosure->insertBefore(textDisplayContainer.release(), m_overlayEnclosure->firstChild());
 }
 
-void MediaControls::showTextTrackDisplay()
-{
-    if (!m_textDisplayContainer)
-        createTextTrackDisplay();
-    m_textDisplayContainer->show();
-}
-
-void MediaControls::hideTextTrackDisplay()
-{
-    if (!m_textDisplayContainer)
-        createTextTrackDisplay();
-    m_textDisplayContainer->hide();
-}
-
 void MediaControls::updateTextTrackDisplay()
 {
     if (!m_textDisplayContainer)
         createTextTrackDisplay();
 
     m_textDisplayContainer->updateDisplay();
 }
 
 DEFINE_TRACE(MediaControls)
 {
@@ skipping 10 matching lines @@
     visitor->trace(m_toggleClosedCaptionsButton);
     visitor->trace(m_fullScreenButton);
     visitor->trace(m_durationDisplay);
     visitor->trace(m_enclosure);
     visitor->trace(m_castButton);
     visitor->trace(m_overlayCastButton);
     HTMLDivElement::trace(visitor);
 }
 
 }