Implement /content/ combinator.

Source/core/css/RuleSetTest.cpp

 /*
  * Copyright (c) 2014, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 105 matching lines @@
 
     helper.addCSSRules("div[attr]#id { }");
     RuleSet& ruleSet = helper.ruleSet();
     AtomicString str("id");
     const TerminatedArray<RuleData>* rules = ruleSet.idRules(str);
     ASSERT_EQ(1u, rules->size());
     AtomicString tagStr("div");
     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