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

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 385 matching lines @@
       break;
     case MediaVolumeSliderThumbPart:
       m_valueID = CSSValueMediaVolumeSliderthumb;
       break;
     case MediaControlsBackgroundPart:
       m_valueID = CSSValueMediaControlsBackground;
       break;
     case MediaControlsFullscreenBackgroundPart:
       m_valueID = CSSValueMediaControlsFullscreenBackground;
       break;
-    case MediaFullscreenVolumeSliderPart:
-      m_valueID = CSSValueMediaFullscreenVolumeSlider;
-      break;
-    case MediaFullscreenVolumeSliderThumbPart:
-      m_valueID = CSSValueMediaFullscreenVolumeSliderThumb;
-      break;
     case MediaCurrentTimePart:
       m_valueID = CSSValueMediaCurrentTimeDisplay;
       break;
     case MediaTimeRemainingPart:
       m_valueID = CSSValueMediaTimeRemainingDisplay;
       break;
     case MediaTrackSelectionCheckmarkPart:
       m_valueID = CSSValueInternalMediaTrackSelectionCheckmark;
       break;
     case MediaClosedCaptionsIconPart:
@@ skipping 3127 matching lines @@
     default:
       break;
   }
   ASSERT_NOT_REACHED();
   return ContainsNone;
 }
 
 }  // namespace blink
 
 #endif