Oilpan: prefer eager finalization over prefinalizers.

Source/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 48 matching lines @@
 
 enum PageshowEventPersistence {
     PageshowEventNotPersisted = 0,
     PageshowEventPersisted = 1
 };
 
 // Note: if you're thinking of returning something DOM-related by reference,
 // please ping dcheng@chromium.org first. You probably don't want to do that.
 class CORE_EXPORT LocalDOMWindow final : public DOMWindow, public WillBeHeapSupplementable<LocalDOMWindow>, public DOMWindowLifecycleNotifier {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(LocalDOMWindow);
-    WILL_BE_USING_PRE_FINALIZER(LocalDOMWindow, dispose);
 public:
     static PassRefPtrWillBeRawPtr<Document> createDocument(const String& mimeType, const DocumentInit&, bool forceXHTML);
     static PassRefPtrWillBeRawPtr<LocalDOMWindow> create(LocalFrame& frame)
     {
         return adoptRefWillBeNoop(new LocalDOMWindow(frame));
     }
     virtual ~LocalDOMWindow();
-    void dispose();
+
+    // LocalDOMWindow is eagerly finalized to allow the destructor
+    // to remove any event listeners still attached.
+    EAGERLY_FINALIZE();
+    DECLARE_VIRTUAL_TRACE();
 
     PassRefPtrWillBeRawPtr<Document> installNewDocument(const String& mimeType, const DocumentInit&, bool forceXHTML = false);
 
     // EventTarget overrides:
     virtual ExecutionContext* executionContext() const override;
     virtual LocalDOMWindow* toDOMWindow() override;
 
     // DOMWindow overrides:
-    DECLARE_VIRTUAL_TRACE();
     bool isLocalDOMWindow() const override { return true; }
     virtual LocalFrame* frame() const override;
     Screen* screen() const override;
     History* history() const override;
     BarProp* locationbar() const override;
     BarProp* menubar() const override;
     BarProp* personalbar() const override;
     BarProp* scrollbars() const override;
     BarProp* statusbar() const override;
     BarProp* toolbar() const override;
@@ skipping 188 matching lines @@
 }
 
 inline String LocalDOMWindow::defaultStatus() const
 {
     return m_defaultStatus;
 }
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h