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

Source/core/css/CSSViewportRule.cpp

Index: Source/core/css/CSSViewportRule.cpp
diff --git a/Source/core/css/CSSViewportRule.cpp b/Source/core/css/CSSViewportRule.cpp
index c658d50d1f11a52157ae5680a13ea079d6d5b22d..2565022631539d95e471cd172cb2ba2d75ff7c19 100644
--- a/Source/core/css/CSSViewportRule.cpp
+++ b/Source/core/css/CSSViewportRule.cpp
@@ -81,4 +81,10 @@ void CSSViewportRule::reattach(StyleRuleBase* rule)
         m_propertiesCSSOMWrapper->reattach(m_viewportRule->mutableProperties());
 }
 
+void CSSViewportRule::trace(Visitor* visitor)
+{
+    visitor->trace(m_viewportRule);
+    CSSRule::trace(visitor);
+}
+
 } // namespace WebCore