Oilpan: Remove Persistent handles from heap allocated CSSRule objects and fix finalization of CSSKe…

Source/core/css/CSSFilterRule.h

Index: Source/core/css/CSSFilterRule.h
diff --git a/Source/core/css/CSSFilterRule.h b/Source/core/css/CSSFilterRule.h
index ef9b946025cf9f0080b72f9324374d29c0178373..823b233776816e1defca1d63c761cc9113ad5629 100644
--- a/Source/core/css/CSSFilterRule.h
+++ b/Source/core/css/CSSFilterRule.h
@@ -54,12 +54,12 @@ public:
 
     CSSStyleDeclaration* style() const;
 
-    virtual void trace(Visitor* visitor) OVERRIDE { CSSRule::trace(visitor); }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     CSSFilterRule(StyleRuleFilter*, CSSStyleSheet* parent);
 
-    RefPtrWillBePersistent<StyleRuleFilter> m_filterRule;
+    RefPtrWillBeMember<StyleRuleFilter> m_filterRule;
     mutable RefPtr<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };