Remove LifecycleNotifier<>::m_context.

Source/core/dom/ContextLifecycleNotifier.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2013 Google 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
@@ skipping 15 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/ContextLifecycleNotifier.h"
 
 #include "core/dom/ActiveDOMObject.h"
 #include "wtf/TemporaryChange.h"
 
 namespace blink {
 
-ContextLifecycleNotifier::ContextLifecycleNotifier(ExecutionContext* context)
-    : LifecycleNotifier<ExecutionContext, ContextLifecycleObserver>(context)
-{
-}
-
 void ContextLifecycleNotifier::addObserver(ContextLifecycleObserver* observer)
 {
     LifecycleNotifier<ExecutionContext, ContextLifecycleObserver>::addObserver(observer);
     if (observer->observerType() == ContextLifecycleObserver::ActiveDOMObjectType)
         RELEASE_ASSERT(m_iterating != IteratingOverActiveDOMObjects);
 }
 
 void ContextLifecycleNotifier::notifyResumingActiveDOMObjects()
 {
     TemporaryChange<IterationType> scope(m_iterating, IteratingOverActiveDOMObjects);
@@ skipping 86 matching lines @@
             continue;
         ActiveDOMObject* activeDOMObject = static_cast<ActiveDOMObject*>(observer);
         if (activeDOMObject == object)
             return true;
     }
     return false;
 }
 #endif
 
 } // namespace blink