Enable/Unprefix Animations & Transitions, add basic tests

sky/engine/core/css/parser/CSSGrammar.y

 %{
 
 /*
  *  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
@@ skipping 169 matching lines @@
 %token CHARSET_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 ATKEYWORD
 
 %token IMPORTANT_SYM
 %token MEDIA_ONLY
 %token MEDIA_NOT
 %token MEDIA_AND
 %token MEDIA_OR
 
 %token SUPPORTS_NOT
@@ skipping 533 matching lines @@
 before_keyframes_rule:
     /* empty */ {
         parser->startRuleHeader(CSSRuleSourceData::KEYFRAMES_RULE);
     }
     ;
 
 keyframes_rule_start:
     before_keyframes_rule KEYFRAMES_SYM maybe_space {
         $$ = false;
     }
-  | before_keyframes_rule WEBKIT_KEYFRAMES_SYM maybe_space {
-        $$ = true;
-    }
     ;
 
 keyframes:
     keyframes_rule_start keyframe_name at_rule_header_end_maybe_space '{' at_rule_body_start maybe_space location_label keyframes_rule closing_brace {
         $$ = parser->createKeyframesRule($2, parser->sinkFloatingKeyframeVector($8), $1 /* isPrefixed */);
     }
     ;
 
 keyframe_name:
     IDENT
@@ skipping 734 matching lines @@
     ;
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%