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

Source/core/css/CSSViewportRule.h

Index: Source/core/css/CSSViewportRule.h
diff --git a/Source/core/css/CSSViewportRule.h b/Source/core/css/CSSViewportRule.h
index e89c331666014b6f43c08149147b024f935e1849..1f1d3d7b41e32edae4d5cb47fcf2aec451bd6267 100644
--- a/Source/core/css/CSSViewportRule.h
+++ b/Source/core/css/CSSViewportRule.h
@@ -54,12 +54,12 @@ public:
 
     CSSStyleDeclaration* style() const;
 
-    virtual void trace(Visitor* visitor) OVERRIDE { CSSRule::trace(visitor); }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     CSSViewportRule(StyleRuleViewport*, CSSStyleSheet*);
 
-    RefPtrWillBePersistent<StyleRuleViewport> m_viewportRule;
+    RefPtrWillBeMember<StyleRuleViewport> m_viewportRule;
     mutable RefPtr<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };