Introduce an injection point to configure the internal pointer of WeakPtr

third_party/WebKit/Source/core/dom/IntersectionObserverController.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IntersectionObserverController_h
 #define IntersectionObserverController_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/IntersectionObserver.h"
 #include "platform/heap/Handle.h"
@@ skipping 24 matching lines @@
     DECLARE_TRACE();
 
 private:
     explicit IntersectionObserverController(Document*);
 
 private:
     // IntersectionObservers for which this is the tracking document.
     HeapHashSet<WeakMember<IntersectionObserver>> m_trackedIntersectionObservers;
     // IntersectionObservers for which this is the execution context of the callback.
     HeapHashSet<Member<IntersectionObserver>> m_pendingIntersectionObservers;
-    WTF::WeakPtrFactory<IntersectionObserverController> m_weakPtrFactory;
+    RevocableWeakMemberFactory<IntersectionObserverController> m_weakPtrFactory;
 
     bool m_callbackFiredWhileSuspended;
 };
 
 } // namespace blink
 
 #endif // IntersectionObserverController_h