Sync the XHR-related interfaces with the spec

Source/core/events/ProgressEvent.cpp

 /*
  * Copyright (C) 2007, 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 
 ProgressEvent::ProgressEvent()
     : m_lengthComputable(false)
     , m_loaded(0)
     , m_total(0)
 {
 }
 
 ProgressEvent::ProgressEvent(const AtomicString& type, const ProgressEventInit& initializer)
     : Event(type, initializer)
-    , m_lengthComputable(false)
-    , m_loaded(0)
-    , m_total(0)
+    , m_lengthComputable(initializer.lengthComputable())
+    , m_loaded(initializer.loaded())
+    , m_total(initializer.total())
 {
-    if (initializer.hasLengthComputable())
-        m_lengthComputable = initializer.lengthComputable();
-    if (initializer.hasLoaded())
-        m_loaded = initializer.loaded();
-    if (initializer.hasTotal())
-        m_total = initializer.total();
 }
 
 ProgressEvent::ProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
     : Event(type, false, true)
     , m_lengthComputable(lengthComputable)
     , m_loaded(loaded)
     , m_total(total)
 {
 }
 
 const AtomicString& ProgressEvent::interfaceName() const
 {
     return EventNames::ProgressEvent;
 }
 
 DEFINE_TRACE(ProgressEvent)
 {
     Event::trace(visitor);
 }
 
 }