Remove UseCounter

sky/engine/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 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 672 matching lines @@
 bool LocalDOMWindow::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
 {
     if (!EventTarget::addEventListener(eventType, listener, useCapture))
         return false;
 
     if (Document* document = this->document())
         document->addListenerTypeIfNeeded(eventType);
 
     lifecycleNotifier().notifyAddEventListener(this, eventType);
 
-    if (eventType == EventTypeNames::unload) {
-        UseCounter::count(document(), UseCounter::DocumentUnloadRegistered);
+    if (eventType == EventTypeNames::unload)
         addUnloadEventListener(this);
-    }
+
     return true;
 }
 
 bool LocalDOMWindow::removeEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
 {
     if (!EventTarget::removeEventListener(eventType, listener, useCapture))
         return false;
 
     lifecycleNotifier().notifyRemoveEventListener(this, eventType);
 
@@ skipping 68 matching lines @@
 {
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<LocalDOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<LocalDOMWindow> > LocalDOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 } // namespace blink