Media query malformed when 'or' is used as a media type.

Source/core/css/CSSGrammar.y.in

 /*
  *  Copyright (C) 2002-2003 Lars Knoll (knoll@kde.org)
  *  Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *  Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *  Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  *  Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 152 matching lines @@
 %token <marginBox> RIGHTTOP_SYM
 %token <marginBox> RIGHTMIDDLE_SYM
 %token <marginBox> RIGHTBOTTOM_SYM
 
 %token ATKEYWORD
 
 %token IMPORTANT_SYM
 %token MEDIA_ONLY
 %token MEDIA_NOT
 %token MEDIA_AND
+%token MEDIA_OR
 
 %token SUPPORTS_NOT
 %token SUPPORTS_AND
 %token SUPPORTS_OR
 
 %token <number> REMS
 %token <number> CHS
 %token <number> QEMS
 %token <number> EMS
 %token <number> EXS
@@ skipping 1739 matching lines @@
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%