List marker pseudo elements.

Source/core/css/parser/CSSGrammar.y

Index: Source/core/css/parser/CSSGrammar.y
diff --git a/Source/core/css/parser/CSSGrammar.y b/Source/core/css/parser/CSSGrammar.y
index 792a54b734f08d5f07a25266b778d567a717aaad..6160bec1127e8e1b5fc8c57774a85c314c7b72e3 100644
--- a/Source/core/css/parser/CSSGrammar.y
+++ b/Source/core/css/parser/CSSGrammar.y
@@ -1343,7 +1343,8 @@ pseudo:
         parser->tokenToLowerCase($3);
         $$->setValue($3);
         CSSSelector::PseudoType type = $$->pseudoType();
-        if (type == CSSSelector::PseudoUnknown) {
+        if (type == CSSSelector::PseudoUnknown ||
+            !parser->isSelectorAllowedInParsingMode(type)) {
             parser->reportError($2, InvalidSelectorPseudoCSSError);
             YYERROR;
         }
@@ -1357,7 +1358,8 @@ pseudo:
         $$->setValue($4);
         // FIXME: This call is needed to force selector to compute the pseudoType early enough.
         CSSSelector::PseudoType type = $$->pseudoType();
-        if (type == CSSSelector::PseudoUnknown) {
+        if (type == CSSSelector::PseudoUnknown ||
+            !parser->isSelectorAllowedInParsingMode(type)) {

[Julien - ping for review, 2015/02/04 01:56:33]

Doh'!?

[dsinclair, 2015/02/04 04:41:32]

? Are you saying this is incorrect, or you don't like the way it's written with
a !?

             parser->reportError($3, InvalidSelectorPseudoCSSError);
             YYERROR;
         }