Re-use CSSParser logic to parse keyframe keys

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 123 matching lines @@
 %token HOST_SYM
 %token CHARSET_SYM
 %token NAMESPACE_SYM
 %token VIEWPORT_RULE_SYM
 %token INTERNAL_DECLS_SYM
 %token INTERNAL_MEDIALIST_SYM
 %token INTERNAL_RULE_SYM
 %token INTERNAL_SELECTOR_SYM
 %token INTERNAL_VALUE_SYM
 %token INTERNAL_KEYFRAME_RULE_SYM
+%token INTERNAL_KEYFRAME_KEY_LIST_SYM
 %token INTERNAL_SUPPORTS_CONDITION_SYM
 %token KEYFRAMES_SYM
 %token WEBKIT_KEYFRAMES_SYM
 %token WEBKIT_REGION_RULE_SYM
 %token WEBKIT_FILTER_RULE_SYM
 %token <marginBox> TOPLEFTCORNER_SYM
 %token <marginBox> TOPLEFT_SYM
 %token <marginBox> TOPCENTER_SYM
 %token <marginBox> TOPRIGHT_SYM
 %token <marginBox> TOPRIGHTCORNER_SYM
@@ skipping 178 matching lines @@
 %%
 
 stylesheet:
     maybe_charset maybe_sgml rule_list
   | internal_decls
   | internal_rule
   | internal_selector
   | internal_value
   | internal_medialist
   | internal_keyframe_rule
+  | internal_keyframe_key_list
   | internal_supports_condition
   ;
 
 internal_rule:
     INTERNAL_RULE_SYM maybe_space valid_rule maybe_space TOKEN_EOF {
         parser->m_rule = $3;
     }
 ;
 
 internal_keyframe_rule:
     INTERNAL_KEYFRAME_RULE_SYM maybe_space keyframe_rule maybe_space TOKEN_EOF {
         parser->m_keyframe = $3;
     }
 ;
 
+internal_keyframe_key_list:
+    INTERNAL_KEYFRAME_KEY_LIST_SYM maybe_space key_list TOKEN_EOF {
+        parser->m_valueList = parser->sinkFloatingValueList($3);
+    }
+;
+
 internal_decls:
     INTERNAL_DECLS_SYM maybe_space_before_declaration declaration_list TOKEN_EOF {
         /* can be empty */
     }
 ;
 
 internal_value:
     INTERNAL_VALUE_SYM maybe_space expr TOKEN_EOF {
         parser->m_valueList = parser->sinkFloatingValueList($3);
         int oldParsedProperties = parser->m_parsedProperties.size();
@@ skipping 1547 matching lines @@
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%