List marker pseudo elements.

Source/core/css/RuleSetTest.cpp

Index: Source/core/css/RuleSetTest.cpp
diff --git a/Source/core/css/RuleSetTest.cpp b/Source/core/css/RuleSetTest.cpp
index 7ada3455e259aa9133ea567e3f1387fc851b7769..038d3ee920424d33ebe414851990c23669c921be 100644
--- a/Source/core/css/RuleSetTest.cpp
+++ b/Source/core/css/RuleSetTest.cpp
@@ -47,6 +47,17 @@ TEST(RuleSetTest, findBestRuleSetAndAdd_CustomPseudoElements)
     ASSERT_EQ(str, rules->at(0).selector().value());
 }
 
+TEST(RuleSetTest, findBestRuleSetAndAdd_MarkerElementNotAllowedInNonUAStyle)
+{
+    CSSTestHelper helper;
+
+    helper.tryAddCSSRules("li::marker { }");
+    RuleSet& ruleSet = helper.ruleSet();
+    AtomicString str("li");
+    const TerminatedArray<RuleData>* rules = ruleSet.tagRules(str);
+    ASSERT_EQ(0u, rules->size());
+}
+
 TEST(RuleSetTest, findBestRuleSetAndAdd_Id)
 {
     CSSTestHelper helper;