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

Source/core/css/CSSStyleRule.cpp

Index: Source/core/css/CSSStyleRule.cpp
diff --git a/Source/core/css/CSSStyleRule.cpp b/Source/core/css/CSSStyleRule.cpp
index a46bd58cee2f091f2be9083f608763c32f407ec7..83174405eed3fd5b7dda6611b8321d1cbede97b9 100644
--- a/Source/core/css/CSSStyleRule.cpp
+++ b/Source/core/css/CSSStyleRule.cpp
@@ -129,4 +129,10 @@ void CSSStyleRule::reattach(StyleRuleBase* rule)
         m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
 }
 
+void CSSStyleRule::trace(Visitor* visitor)
+{
+    visitor->trace(m_styleRule);
+    CSSRule::trace(visitor);
+}
+
 } // namespace WebCore