[WIP]Oilpan: checking for nearly-dead observers.

Source/platform/LifecycleObserver.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 57 matching lines @@
     void setContext(Context*);
 
 private:
     RawPtrWillBeWeakMember<Context> m_lifecycleContext;
 };
 
 template<typename T, typename Observer, typename Notifier>
 inline void LifecycleObserver<T, Observer, Notifier>::setContext(typename LifecycleObserver<T, Observer, Notifier>::Context* context)
 {
     if (m_lifecycleContext)
-        static_cast<Notifier*>(m_lifecycleContext.get())->removeObserver(static_cast<Observer*>(this));
+        static_cast<Notifier*>(m_lifecycleContext.get())->removeObserver(static_cast<Observer*>(this), IsGarbageCollectedType<T>::value);
 
     m_lifecycleContext = context;
 
     if (m_lifecycleContext)
-        static_cast<Notifier*>(m_lifecycleContext.get())->addObserver(static_cast<Observer*>(this));
+        static_cast<Notifier*>(m_lifecycleContext.get())->addObserver(static_cast<Observer*>(this), IsGarbageCollectedType<T>::value);
 }
 
 } // namespace blink
 
 #endif // LifecycleObserver_h