Add support for case-insensitive attribute value selectors

Source/core/css/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 330 matching lines @@
 %type <boolean> declaration_list
 %type <boolean> decl_list
 %type <boolean> declaration
 %type <boolean> declarations_and_margins
 
 %type <boolean> prio
 
 %type <integer> match
 %type <integer> unary_operator
 %type <integer> maybe_unary_operator
+%type <integer> attr_flags
+%type <integer> maybe_attr_flags
 %type <character> operator
 
 %type <valueList> expr
 %type <value> term
 %type <value> unary_term
 %type <value> function
 %type <value> calc_func_term
 %type <character> calc_func_operator
 %type <valueList> calc_func_expr
 %type <valueList> calc_func_paren_expr
@@ skipping 874 matching lines @@
   ;
 
 attr_name:
     IDENT maybe_space {
         if (parser->m_context.isHTMLDocument())
             parser->tokenToLowerCase($1);
         $$ = $1;
     }
     ;
 
+attr_flags:
+    IDENT maybe_space {
+        unsigned flags;
+        if (!parser->parseAttributeFlags(flags, $1))
+            YYERROR;
+        $$ = flags;
+    }
+    ;
+
+maybe_attr_flags:
+    attr_flags
+    | /* empty */ { $$ = CSSSelector::NoAttributeFlags; }
+    ;
+
 attrib:
     '[' maybe_space attr_name closing_square_bracket {
         $$ = parser->createFloatingSelector();
-        $$->setAttribute(QualifiedName(nullAtom, $3, nullAtom));
+        $$->setAttribute(QualifiedName(nullAtom, $3, nullAtom), CSSSelector::NoAttributeFlags);
         $$->setMatch(CSSSelector::Set);
     }
-    | '[' maybe_space attr_name match maybe_space ident_or_string maybe_space closing_square_bracket {
+    | '[' maybe_space attr_name match maybe_space ident_or_string maybe_space maybe_attr_flags closing_square_bracket {
         $$ = parser->createFloatingSelector();
-        $$->setAttribute(QualifiedName(nullAtom, $3, nullAtom));
+        $$->setAttribute(QualifiedName(nullAtom, $3, nullAtom), $8);
         $$->setMatch((CSSSelector::Match)$4);
         $$->setValue($6);
     }
     | '[' maybe_space namespace_selector attr_name closing_square_bracket {
         $$ = parser->createFloatingSelector();
-        $$->setAttribute(parser->determineNameInNamespace($3, $4));
+        $$->setAttribute(parser->determineNameInNamespace($3, $4), CSSSelector::NoAttributeFlags);
         $$->setMatch(CSSSelector::Set);
     }
-    | '[' maybe_space namespace_selector attr_name match maybe_space ident_or_string maybe_space closing_square_bracket {
+    | '[' maybe_space namespace_selector attr_name match maybe_space ident_or_string maybe_space maybe_attr_flags closing_square_bracket {
         $$ = parser->createFloatingSelector();
-        $$->setAttribute(parser->determineNameInNamespace($3, $4));
+        $$->setAttribute(parser->determineNameInNamespace($3, $4), $9);
         $$->setMatch((CSSSelector::Match)$5);
         $$->setValue($7);
     }
     | '[' selector_recovery closing_square_bracket {
         YYERROR;
     }
   ;
 
 match:
     '=' {
@@ skipping 548 matching lines @@
     ;
 
 rule_error_recovery:
     /* empty */
   | rule_error_recovery error
   | rule_error_recovery invalid_square_brackets_block
   | rule_error_recovery invalid_parentheses_block
     ;
 
 %%