Remove beforeunload events.

sky/engine/core/events/EventTarget.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  *           (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 271 matching lines @@
 void EventTarget::fireEventListeners(Event* event, EventTargetData* d, EventListenerVector& entry)
 {
     RefPtrWillBeRawPtr<EventTarget> protect(this);
 
     // Fire all listeners registered for this event. Don't fire listeners removed
     // during event dispatch. Also, don't fire event listeners added during event
     // dispatch. Conveniently, all new event listeners will be added after or at
     // index |size|, so iterating up to (but not including) |size| naturally excludes
     // new event listeners.
 
-    if (event->type() == EventTypeNames::beforeunload) {
-        if (LocalDOMWindow* executingWindow = this->executingWindow())
-            UseCounter::count(executingWindow->document(), UseCounter::DocumentBeforeUnloadFired);
-    } else if (event->type() == EventTypeNames::unload) {
+    if (event->type() == EventTypeNames::unload) {
         if (LocalDOMWindow* executingWindow = this->executingWindow())
             UseCounter::count(executingWindow->document(), UseCounter::DocumentUnloadFired);
     } else if (event->type() == EventTypeNames::DOMFocusIn || event->type() == EventTypeNames::DOMFocusOut) {
         if (LocalDOMWindow* executingWindow = this->executingWindow())
             UseCounter::count(executingWindow->document(), UseCounter::DOMFocusInOutEvent);
     } else if (event->type() == EventTypeNames::focusin || event->type() == EventTypeNames::focusout) {
         if (LocalDOMWindow* executingWindow = this->executingWindow())
             UseCounter::count(executingWindow->document(), UseCounter::FocusInOutEvent);
     }
 
@@ skipping 57 matching lines @@
     // they have one less listener to invoke.
     if (d->firingEventIterators) {
         for (size_t i = 0; i < d->firingEventIterators->size(); ++i) {
             d->firingEventIterators->at(i).iterator = 0;
             d->firingEventIterators->at(i).end = 0;
         }
     }
 }
 
 } // namespace blink