Oilpan: add [WillBeGarbageCollected] for Node.

Source/core/frame/DOMWindow.h

Index: Source/core/frame/DOMWindow.h
diff --git a/Source/core/frame/DOMWindow.h b/Source/core/frame/DOMWindow.h
index 4c065e403e66c37169e58cc8bcf05ba79b4c54c8..64bbf678cec1bb403ca1093ca2ae0e4c729c1508 100644
--- a/Source/core/frame/DOMWindow.h
+++ b/Source/core/frame/DOMWindow.h
@@ -343,7 +343,14 @@ enum PageshowEventPersistence {
         void resetDOMWindowProperties();
         void willDestroyDocumentInFrame();
 
-        RefPtr<Document> m_document;
+        enum BroadcastListenerRemoval {

[haraken, 2014/05/23 20:53:58]

Shall we add a FIXME to remove this?

Once we move EventTarget to the heap and make DOMWindowSet a hash set of weak
members, the contents of removeAllEventListeners(DoNotBroadcastListenerRemoval)
should become just one line:

  lifecycleNotifier().notifyRemoveAllEventListeners(this);

and thus we can just write the line in ~DOMWindow().

[sof, 2014/05/24 06:53:11]

Done.

+            DoNotBroadcastListenerRemoval,
+            DoBroadcastListenerRemoval
+        };
+
+        void removeAllEventListeners(BroadcastListenerRemoval);

[haraken, 2014/05/23 20:53:58]

It's a bit confusing to have the overridden version of removeAllEventListeners()
and the not-overridden version of removeAllEventListeners(). Shall we rename
this to removeAllEventListenersInternal()?

[sof, 2014/05/24 06:53:11]

Done.

+
+        RefPtrWillBeMember<Document> m_document;
 
         bool m_shouldPrintWhenFinishedLoading;
 #if ASSERT_ENABLED