Improve fidelity of XHR progress events.

Source/core/xml/XMLHttpRequestProgressEventThrottle.cpp

 /*
  * Copyright (C) 2010 Julien Chaffraix <jchaffraix@webkit.org>  All right reserved.
  * Copyright (C) 2012 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 80 matching lines @@
     if (m_deferEvents) {
         if (m_deferredEvents.size() > 1 && event->type() == EventTypeNames::readystatechange && event->type() == m_deferredEvents.last()->type()) {
             // Readystatechange events are state-less so avoid repeating two identical events in a row on resume.
             return;
         }
         m_deferredEvents.append(event);
     } else
         m_target->dispatchEvent(event);
 }
 
-void XMLHttpRequestProgressEventThrottle::dispatchEventAndLoadEnd(PassRefPtr<Event> event)
+void XMLHttpRequestProgressEventThrottle::dispatchEventAndLoadEnd(const AtomicString& type, bool lengthComputable, unsigned long long bytesSent, unsigned long long total)
 {
-    ASSERT(event->type() == EventTypeNames::load || event->type() == EventTypeNames::abort || event->type() == EventTypeNames::error || event->type() == EventTypeNames::timeout);
+    ASSERT(type == EventTypeNames::load || type == EventTypeNames::abort || type == EventTypeNames::error || type == EventTypeNames::timeout);
 
-    dispatchEvent(event);
-    dispatchEvent(XMLHttpRequestProgressEvent::create(EventTypeNames::loadend));
+    dispatchEvent(XMLHttpRequestProgressEvent::create(type, lengthComputable, bytesSent, total));
+    dispatchEvent(XMLHttpRequestProgressEvent::create(EventTypeNames::loadend, lengthComputable, bytesSent, total));
 }
 
 bool XMLHttpRequestProgressEventThrottle::flushDeferredProgressEvent()
 {
     if (m_deferEvents && m_deferredProgressEvent) {
         // Move the progress event to the queue, to get it in the right order on resume.
         m_deferredEvents.append(m_deferredProgressEvent);
         m_deferredProgressEvent = 0;
         return true;
     }
@@ skipping 93 matching lines @@
     }
 
     // Do not dispatch events inline here, since ExecutionContext is iterating over
     // the list of active DOM objects to resume them, and any activated JS event-handler
     // could insert new active DOM objects to the list.
     // m_deferEvents is kept true until all deferred events have been dispatched.
     m_dispatchDeferredEventsTimer.startOneShot(0);
 }
 
 } // namespace WebCore