Oilpan: Reapply: Remove all the RefPtrs and most of the raw pointers to style

Source/core/css/ElementRuleCollector.cpp

Index: Source/core/css/ElementRuleCollector.cpp
diff --git a/Source/core/css/ElementRuleCollector.cpp b/Source/core/css/ElementRuleCollector.cpp
index cfc7ce3cbe49c0e5ab2832c531f4a17ab30c8148..6675cdce6afe0e97480559f4f9dfe2e77b8200f1 100644
--- a/Source/core/css/ElementRuleCollector.cpp
+++ b/Source/core/css/ElementRuleCollector.cpp
@@ -81,7 +81,7 @@ PassRefPtrWillBeRawPtr<CSSRuleList> ElementRuleCollector::matchedCSSRuleList()
 inline void ElementRuleCollector::addMatchedRule(const RuleData* rule, unsigned specificity, CascadeScope cascadeScope, CascadeOrder cascadeOrder, unsigned styleSheetIndex, const CSSStyleSheet* parentStyleSheet)
 {
     if (!m_matchedRules)
-        m_matchedRules = adoptPtr(new Vector<MatchedRule, 32>);
+        m_matchedRules = adoptPtrWillBeNoop(new WillBeHeapVector<MatchedRule, 32>);
     m_matchedRules->append(MatchedRule(rule, specificity, cascadeScope, cascadeOrder, styleSheetIndex, parentStyleSheet));
 }
 
@@ -234,7 +234,7 @@ void ElementRuleCollector::sortAndTransferMatchedRules()
 
     sortMatchedRules();
 
-    Vector<MatchedRule, 32>& matchedRules = *m_matchedRules;
+    WillBeHeapVector<MatchedRule, 32>& matchedRules = *m_matchedRules;
     if (m_mode == SelectorChecker::CollectingStyleRules) {
         for (unsigned i = 0; i < matchedRules.size(); ++i)
             ensureStyleRuleList()->m_list.append(matchedRules[i].ruleData()->rule());