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

Source/core/css/CSSStyleRule.h

Index: Source/core/css/CSSStyleRule.h
diff --git a/Source/core/css/CSSStyleRule.h b/Source/core/css/CSSStyleRule.h
index 752721d66f06a0d922eb2ffd055dbf644fca41c9..d5580ce8cf0c1165d7b07439ce55df64b9aafa1b 100644
--- a/Source/core/css/CSSStyleRule.h
+++ b/Source/core/css/CSSStyleRule.h
@@ -52,14 +52,14 @@ public:
     // FIXME: Not CSSOM. Remove.
     StyleRule* styleRule() const { return m_styleRule.get(); }
 
-    virtual void trace(Visitor* visitor) OVERRIDE { CSSRule::trace(visitor); }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     CSSStyleRule(StyleRule*, CSSStyleSheet*);
 
     String generateSelectorText() const;
 
-    RefPtrWillBePersistent<StyleRule> m_styleRule;
+    RefPtrWillBeMember<StyleRule> m_styleRule;
     mutable RefPtr<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };