Oilpan: move context menu providers to the heap.

Source/core/page/CustomContextMenuProvider.h

Index: Source/core/page/CustomContextMenuProvider.h
diff --git a/Source/core/page/CustomContextMenuProvider.h b/Source/core/page/CustomContextMenuProvider.h
index 9a5fab0948b5de6bb1b0336e8e49025abd6947fe..a59a0913bc760c9609ed2ff55e7acccf6f9fefaa 100644
--- a/Source/core/page/CustomContextMenuProvider.h
+++ b/Source/core/page/CustomContextMenuProvider.h
@@ -18,14 +18,17 @@ class HTMLMenuItemElement;
 
 class CustomContextMenuProvider final : public ContextMenuProvider {
 public:
-    static PassRefPtr<CustomContextMenuProvider> create(HTMLMenuElement& menu, HTMLElement& subject)
+    virtual ~CustomContextMenuProvider();
+
+    static PassRefPtrWillBeRawPtr<CustomContextMenuProvider> create(HTMLMenuElement& menu, HTMLElement& subject)
     {
-        return adoptRef(new CustomContextMenuProvider(menu, subject));
+        return adoptRefWillBeNoop(new CustomContextMenuProvider(menu, subject));
     }
 
+    virtual void trace(Visitor*);
+
 private:
     CustomContextMenuProvider(HTMLMenuElement&, HTMLElement&);
-    virtual ~CustomContextMenuProvider();
 
     virtual void populateContextMenu(ContextMenu*) override;
     virtual void contextMenuItemSelected(const ContextMenuItem*) override;
@@ -35,9 +38,9 @@ private:
     void appendMenuItem(HTMLMenuItemElement*, ContextMenu&);
     HTMLElement* menuItemAt(unsigned menuId);
 
-    RefPtrWillBePersistent<HTMLMenuElement> m_menu;
-    RefPtrWillBePersistent<HTMLElement> m_subjectElement;
-    WillBePersistentHeapVector<RefPtrWillBeMember<HTMLElement> > m_menuItems;
+    RefPtrWillBeMember<HTMLMenuElement> m_menu;
+    RefPtrWillBeMember<HTMLElement> m_subjectElement;
+    WillBeHeapVector<RefPtrWillBeMember<HTMLElement> > m_menuItems;
 };
 
 } // namespace blink