Remove meta viewport and @viewport CSS rules.

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 159 matching lines @@
 %nonassoc '.'
 %nonassoc '['
 %nonassoc <string> '*'
 %nonassoc error
 %left '|'
 
 %token MEDIA_SYM
 %token SUPPORTS_SYM
 %token FONT_FACE_SYM
 %token CHARSET_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
@@ skipping 54 matching lines @@
 %type <rule> media
 %type <rule> font_face
 %type <rule> keyframes
 %type <rule> rule
 %type <rule> valid_rule
 %type <ruleList> block_rule_body
 %type <ruleList> block_rule_list
 %type <rule> block_rule
 %type <rule> block_valid_rule
 %type <rule> supports
-%type <rule> viewport
 %type <boolean> keyframes_rule_start
 
 %type <string> ident_or_string
 %type <string> medium
 
 %type <mediaList> media_list
 %type <mediaList> maybe_media_list
 %type <mediaList> mq_list
 %type <mediaQuery> media_query
 %type <mediaQuery> valid_media_query
@@ skipping 180 matching lines @@
          parser->m_styleSheet->parserAppendRule($2);
  }
  ;
 
 valid_rule:
     ruleset
   | media
   | font_face
   | keyframes
   | supports
-  | viewport
   ;
 
 before_rule:
     /* empty */ {
         parser->startRule();
     }
   ;
 
 rule:
     before_rule valid_rule {
@@ skipping 24 matching lines @@
         parser->endRule(false);
     }
   ;
 
 block_valid_rule:
     ruleset
   | font_face
   | media
   | keyframes
   | supports
-  | viewport
   ;
 
 block_rule:
     before_rule block_valid_rule {
         $$ = $2;
         parser->endRule(!!$$);
     }
   | before_rule invalid_rule {
         $$ = 0;
         parser->endRule(false);
@@ skipping 313 matching lines @@
     }
     ;
 
 font_face:
     before_font_face_rule FONT_FACE_SYM at_rule_header_end_maybe_space
     '{' at_rule_body_start maybe_space_before_declaration declaration_list closing_brace {
         $$ = parser->createFontFaceRule();
     }
     ;
 
-before_viewport_rule:
-    /* empty */ {
-        parser->markViewportRuleBodyStart();
-        parser->startRuleHeader(CSSRuleSourceData::VIEWPORT_RULE);
-    }
-    ;
-
-viewport:
-    before_viewport_rule VIEWPORT_RULE_SYM at_rule_header_end_maybe_space
-    '{' at_rule_body_start maybe_space_before_declaration declaration_list closing_brace {
-        $$ = parser->createViewportRule();
-        parser->markViewportRuleBodyEnd();
-    }
-;
-
 maybe_unary_operator:
     unary_operator
     | /* empty */ { $$ = 1; }
     ;
 
 unary_operator:
     '-' { $$ = -1; }
   | '+' { $$ = 1; }
   ;
 
@@ skipping 577 matching lines @@
   | at_invalid_rule_header_end invalid_block
     ;
 
 regular_invalid_at_rule_header:
     keyframes_rule_start at_rule_header_recovery
   | before_font_face_rule FONT_FACE_SYM at_rule_header_recovery
   | before_supports_rule SUPPORTS_SYM error error_location rule_error_recovery {
         parser->reportError($4, InvalidSupportsConditionCSSError);
         parser->popSupportsRuleData();
     }
-  | before_viewport_rule VIEWPORT_RULE_SYM at_rule_header_recovery {
-        parser->markViewportRuleBodyEnd();
-    }
   | error_location invalid_at at_rule_header_recovery {
         parser->resumeErrorLogging();
         parser->reportError($1, InvalidRuleCSSError);
     }
   ;
 
 invalid_rule:
     error error_location rule_error_recovery at_invalid_rule_header_end invalid_block {
         parser->reportError($2, InvalidRuleCSSError);
     }
@@ skipping 52 matching lines @@
     ;
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%