Oilpan: move custom element objects to the heap.

Source/core/dom/custom/CustomElementRegistrationContext.h

Index: Source/core/dom/custom/CustomElementRegistrationContext.h
diff --git a/Source/core/dom/custom/CustomElementRegistrationContext.h b/Source/core/dom/custom/CustomElementRegistrationContext.h
index 8a420ca32facb9c85c9b09d1208841280925d188..1602c7cdc9ecf123720fcbba959cafe564805882 100644
--- a/Source/core/dom/custom/CustomElementRegistrationContext.h
+++ b/Source/core/dom/custom/CustomElementRegistrationContext.h
@@ -49,9 +49,9 @@ class Document;
 class Element;
 class ExceptionState;
 
-class CustomElementRegistrationContext : public RefCounted<CustomElementRegistrationContext> {
+class CustomElementRegistrationContext FINAL : public RefCountedWillBeGarbageCollectedFinalized<CustomElementRegistrationContext> {
 public:
-    static PassRefPtr<CustomElementRegistrationContext> create();
+    static PassRefPtrWillBeRawPtr<CustomElementRegistrationContext> create();
 
     ~CustomElementRegistrationContext() { }
 
@@ -64,6 +64,8 @@ public:
 
     void resolve(Element*, const CustomElementDescriptor&);
 
+    void trace(Visitor*);
+
 protected:
     CustomElementRegistrationContext() { }
 
@@ -76,7 +78,7 @@ private:
     CustomElementRegistry m_registry;
 
     // Element creation
-    CustomElementUpgradeCandidateMap m_candidates;
+    OwnPtrWillBeMember<CustomElementUpgradeCandidateMap> m_candidates;
 };
 
 }