Refine the UseCounters for DOMFocusIn/Out and focusin/out events

Source/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 281 matching lines @@
 
     if (event->type() == EventTypeNames::beforeunload) {
         if (DOMWindow* executingWindow = this->executingWindow()) {
             if (executingWindow->top())
                 UseCounter::count(executingWindow->document(), UseCounter::SubFrameBeforeUnloadFired);
             UseCounter::count(executingWindow->document(), UseCounter::DocumentBeforeUnloadFired);
         }
     } else if (event->type() == EventTypeNames::unload) {
         if (DOMWindow* executingWindow = this->executingWindow())
             UseCounter::count(executingWindow->document(), UseCounter::DocumentUnloadFired);
+    } else if (event->type() == EventTypeNames::DOMFocusIn || event->type() == EventTypeNames::DOMFocusOut) {
+        if (DOMWindow* executingWindow = this->executingWindow())
+            UseCounter::count(executingWindow->document(), UseCounter::DOMFocusInOutEvent);
+    } else if (event->type() == EventTypeNames::focusin || event->type() == EventTypeNames::focusout) {
+        if (DOMWindow* executingWindow = this->executingWindow())
+            UseCounter::count(executingWindow->document(), UseCounter::FocusInOutEvent);
     }
 
     size_t i = 0;
     size_t size = entry.size();
     if (!d->firingEventIterators)
         d->firingEventIterators = adoptPtr(new FiringEventIteratorVector);
     d->firingEventIterators->append(FiringEventIterator(event->type(), i, size));
     for ( ; i < size; ++i) {
         RegisteredEventListener& registeredListener = entry[i];
         if (event->eventPhase() == Event::CAPTURING_PHASE && !registeredListener.useCapture)
@@ skipping 51 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 WebCore