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

Source/core/css/CSSPageRule.h

Index: Source/core/css/CSSPageRule.h
diff --git a/Source/core/css/CSSPageRule.h b/Source/core/css/CSSPageRule.h
index 9245676fd9102660d1488c5605f8827f3f0a4c3b..4192e60acb041ff0bf6031b180b4c7bd15b45e8d 100644
--- a/Source/core/css/CSSPageRule.h
+++ b/Source/core/css/CSSPageRule.h
@@ -50,12 +50,12 @@ public:
     String selectorText() const;
     void setSelectorText(const String&);
 
-    virtual void trace(Visitor* visitor) OVERRIDE { CSSRule::trace(visitor); }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     CSSPageRule(StyleRulePage*, CSSStyleSheet*);
 
-    RefPtrWillBePersistent<StyleRulePage> m_pageRule;
+    RefPtrWillBeMember<StyleRulePage> m_pageRule;
     mutable RefPtr<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };