RuleSet should use malloc rather than Vector

Source/core/css/ElementRuleCollector.h

Index: Source/core/css/ElementRuleCollector.h
diff --git a/Source/core/css/ElementRuleCollector.h b/Source/core/css/ElementRuleCollector.h
index 8e10b0b279371e8f084955d45ae63cf83dd44b6f..5d4328b75d6ede9a4cffd647eb0532fd0be5366f 100644
--- a/Source/core/css/ElementRuleCollector.h
+++ b/Source/core/css/ElementRuleCollector.h
@@ -77,7 +77,9 @@ public:
 private:
     Document* document() { return m_state.document(); }
 
+    void collectRuleIfMatches(const RuleData&, const MatchRequest&, StyleResolver::RuleRange&);
     void collectMatchingRulesForList(const Vector<RuleData>*, const MatchRequest&, StyleResolver::RuleRange&);
+    void collectMatchingRulesForList(const RuleData*, const MatchRequest&, StyleResolver::RuleRange&);
     bool ruleMatches(const RuleData&, const ContainerNode* scope, PseudoId&);
 
     void sortMatchedRules();