Remove the mode getter/setter for in-band text tracks

Source/core/html/track/InbandTextTrack.cpp

 /*
  * Copyright (C) 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 57 matching lines @@
         break;
     }
 }
 
 InbandTextTrack::~InbandTextTrack()
 {
     // Make sure m_private was cleared by trackRemoved() before destruction.
     ASSERT(!m_private);
 }
 
-void InbandTextTrack::setMode(const AtomicString& mode)
-{
-    TextTrack::setMode(mode);
-
-    if (!m_private)
-        return;
-
-    if (mode == TextTrack::disabledKeyword())
-        m_private->setMode(InbandTextTrackPrivate::Disabled);
-    else if (mode == TextTrack::hiddenKeyword())
-        m_private->setMode(InbandTextTrackPrivate::Hidden);
-    else if (mode == TextTrack::showingKeyword())
-        m_private->setMode(InbandTextTrackPrivate::Showing);
-    else
-        ASSERT_NOT_REACHED();
-}
-
 size_t InbandTextTrack::inbandTrackIndex()
 {
     ASSERT(m_private);
     return m_private->textTrackIndex();
 }
 
 void InbandTextTrack::trackRemoved()
 {
     ASSERT(m_private);
     m_private->setClient(0);
     m_private = 0;
     clearClient();
 }
 
 void InbandTextTrack::addWebVTTCue(InbandTextTrackPrivate* trackPrivate, double start, double end, const String& id, const String& content, const String& settings)
 {
     ASSERT_UNUSED(trackPrivate, trackPrivate == m_private);
 
     RefPtr<TextTrackCue> cue = TextTrackCue::create(document(), start, end, content);
     cue->setId(id);
     cue->setCueSettings(settings);
 
     if (hasCue(cue.get()))
         return;
 
     addCue(cue);
 }
 
 } // namespace WebCore