Revert of Implement /content/ combinator.

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 622ab24c14b3127dad539f6ff8a601c6c2d8f301..8fd5ec63bba8c0099d2801132daea9591b8bb07d 100644
--- a/Source/core/css/RuleSetTest.cpp
+++ b/Source/core/css/RuleSetTest.cpp
@@ -123,4 +123,17 @@ TEST(RuleSetTest, findBestRuleSetAndAdd_TagThenAttrThenId)
     ASSERT_EQ(tagStr, rules->at(0).selector().tagQName().localName());
 }
 
+TEST(RuleSetTest, findBestRuleSetAndAdd_DivWithContent)
+{
+    CSSTestHelper helper;
+
+    helper.addCSSRules("div::content { }");
+    RuleSet& ruleSet = helper.ruleSet();
+    AtomicString str("div");
+    const TerminatedArray<RuleData>* rules = ruleSet.tagRules(str);
+    ASSERT_EQ(1u, rules->size());
+    AtomicString valueStr("content");
+    ASSERT_EQ(valueStr, rules->at(0).selector().value());
+}
+
 } // namespace WebCore