Remove unused includes from core/html .cpp files

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 28 matching lines @@
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/shadow/MediaControls.h"
 #include "core/html/track/TextTrack.h"
 #include "core/html/track/TextTrackList.h"
 #include "core/page/CaptionUserPreferences.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Frame.h"
 #include "core/page/Page.h"
 #include "core/page/PageGroup.h"
 #include "core/page/Settings.h"
-#include "core/platform/Language.h"
 #include "core/platform/LocalizedStrings.h"
 #include "core/platform/graphics/GraphicsContext.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderMediaControlElements.h"
 #include "core/rendering/RenderSlider.h"
 #include "core/rendering/RenderTheme.h"
 #include "core/rendering/RenderVideo.h"
 #include "core/rendering/RenderView.h"
 
 namespace WebCore {
@@ skipping 731 matching lines @@
     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