[oilpan] Figure out lifetime of remaining Node raw pointers (Part 2)

Source/core/page/Frame.h

Index: Source/core/page/Frame.h
diff --git a/Source/core/page/Frame.h b/Source/core/page/Frame.h
index 04305f52b6e514a70c6d0bf64b5c6ffa7f1f3d63..35c48270225813a7c5b59cca8b096db09eb14a67 100644
--- a/Source/core/page/Frame.h
+++ b/Source/core/page/Frame.h
@@ -179,7 +179,7 @@ namespace WebCore {
         mutable FrameLoader m_loader;
         mutable NavigationScheduler m_navigationScheduler;
 
-        // FIXME(oilpan): Move Frame to the heap and use a Member.
+        // FIXME(oilpan): This should be a strong pointer.
         HTMLFrameOwnerElement* m_ownerElement;
         RefPtr<FrameView> m_view;
         Persistent<Document> m_doc;