Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/speech/SpeechRecognitionEvent.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 39 matching lines @@
 }
 
 PassRefPtr<SpeechRecognitionEvent> SpeechRecognitionEvent::createNoMatch(PassRefPtrWillBeRawPtr<SpeechRecognitionResult> result)
 {
     if (result) {
         WillBeHeapVector<RefPtrWillBeMember<SpeechRecognitionResult> > results;
         results.append(result);
         return adoptRef(new SpeechRecognitionEvent(EventTypeNames::nomatch, 0, SpeechRecognitionResultList::create(results)));
     }
 
-    return adoptRef(new SpeechRecognitionEvent(EventTypeNames::nomatch, 0, 0));
+    return adoptRef(new SpeechRecognitionEvent(EventTypeNames::nomatch, 0, nullptr));
 }
 
 const AtomicString& SpeechRecognitionEvent::interfaceName() const
 {
     return EventNames::SpeechRecognitionEvent;
 }
 
 SpeechRecognitionEvent::SpeechRecognitionEvent()
     : m_resultIndex(0)
 {
@@ skipping 15 matching lines @@
 {
     ScriptWrappable::init(this);
 }
 
 SpeechRecognitionEvent::~SpeechRecognitionEvent()
 {
     ScriptWrappable::init(this);
 }
 
 } // namespace WebCore