Remove the lifetime hack in ImageLoader where it keeps its assoc element alive

third_party/WebKit/Source/core/loader/ImageLoader.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 116 matching lines @@
 
     LayoutImageResource* layoutImageResource();
     void updateLayoutObject();
 
     void setImageWithoutConsideringPendingLoadEvent(ImageResource*);
     void clearFailedLoadURL();
     void dispatchErrorEvent();
     void crossSiteOrCSPViolationOccurred(AtomicString);
     void enqueueImageLoadingMicroTask(UpdateFromElementBehavior, ReferrerPolicy);
 
-    void timerFired(TimerBase*);
-
     KURL imageSourceToKURL(AtomicString) const;
 
     // Used to determine whether to immediately initiate the load
     // or to schedule a microtask.
     bool shouldLoadImmediately(const KURL&) const;
 
     // For Oilpan, we must run dispose() as a prefinalizer and call
     // m_image->removeClient(this) (and more.) Otherwise, the ImageResource can invoke
     // didAddClient() for the ImageLoader that is about to die in the current
     // lazy sweeping, and the didAddClient() can access on-heap objects that
     // have already been finalized in the current lazy sweeping.
     void dispose();
 
     Member<Element> m_element;
     Member<ImageResource> m_image;
-    // FIXME: Oilpan: We might be able to remove this Persistent hack when
-    // ImageResourceClient is traceable.
-    GC_PLUGIN_IGNORE("http://crbug.com/383741")
-    Persistent<Element> m_keepAlive;
 
-    Timer<ImageLoader> m_derefElementTimer;
     AtomicString m_failedLoadURL;
     WeakPtr<Task> m_pendingTask; // owned by Microtask
     std::unique_ptr<IncrementLoadEventDelayCount> m_loadDelayCounter;
     bool m_hasPendingLoadEvent : 1;
     bool m_hasPendingErrorEvent : 1;
     bool m_imageComplete : 1;
     bool m_loadingImageDocument : 1;
-    bool m_elementIsProtected : 1;
     bool m_suppressErrorEvents : 1;
 };
 
 } // namespace blink
 
 #endif