Remove the -webkit-fullscreen-volume-* pseudos, they're dead code.

third_party/WebKit/Source/core/paint/ThemePainter.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 114 matching lines @@
     case MediaSliderPart:
       return MediaControlsPainter::paintMediaSlider(o, paintInfo, r);
     case MediaSliderThumbPart:
       return MediaControlsPainter::paintMediaSliderThumb(o, paintInfo, r);
     case MediaVolumeSliderContainerPart:
       return true;
     case MediaVolumeSliderPart:
       return MediaControlsPainter::paintMediaVolumeSlider(o, paintInfo, r);
     case MediaVolumeSliderThumbPart:
       return MediaControlsPainter::paintMediaVolumeSliderThumb(o, paintInfo, r);
-    case MediaFullscreenVolumeSliderPart:
-    case MediaFullscreenVolumeSliderThumbPart:
     case MediaTimeRemainingPart:
     case MediaCurrentTimePart:
     case MediaControlsBackgroundPart:
       return true;
     case MediaCastOffButtonPart:
     case MediaOverlayCastOffButtonPart:
       return MediaControlsPainter::paintMediaCastButton(o, paintInfo, r);
     case MediaTrackSelectionCheckmarkPart:
       return MediaControlsPainter::paintMediaTrackSelectionCheckmark(
           o, paintInfo, r);
@@ skipping 259 matching lines @@
     i.context.translate(-unzoomedRect.x(), -unzoomedRect.y());
   }
 
   Platform::current()->fallbackThemeEngine()->paint(
       canvas, WebFallbackThemeEngine::PartRadio, getWebFallbackThemeState(o),
       WebRect(unzoomedRect), &extraParams);
   return false;
 }
 
 }  // namespace blink