Make IDL Callbacks non-refcounted by default

Source/modules/mediastream/MediaStreamTrackSourcesRequest.cpp

 /*
  * Copyright (C) 2013 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:
  * 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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "modules/mediastream/MediaStreamTrackSourcesRequest.h"
 
 #include "modules/mediastream/MediaStreamTrackSourcesCallback.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/WebSourceInfo.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-PassRefPtr<MediaStreamTrackSourcesRequest> MediaStreamTrackSourcesRequest::create(String origin, PassRefPtr<MediaStreamTrackSourcesCallback> callback)
+PassRefPtr<MediaStreamTrackSourcesRequest> MediaStreamTrackSourcesRequest::create(String origin, PassOwnPtr<MediaStreamTrackSourcesCallback> callback)
 {
     return adoptRef(new MediaStreamTrackSourcesRequest(origin, callback));
 }
 
-MediaStreamTrackSourcesRequest::MediaStreamTrackSourcesRequest(String origin, PassRefPtr<MediaStreamTrackSourcesCallback> callback)
+MediaStreamTrackSourcesRequest::MediaStreamTrackSourcesRequest(String origin, PassOwnPtr<MediaStreamTrackSourcesCallback> callback)
     : m_callback(callback)
     , m_scheduledEventTimer(this, &MediaStreamTrackSourcesRequest::scheduledEventTimerFired)
 {
     m_origin = origin;
 }
 
 MediaStreamTrackSourcesRequest::~MediaStreamTrackSourcesRequest()
 {
 }
 
 void MediaStreamTrackSourcesRequest::requestSucceeded(const blink::WebVector<blink::WebSourceInfo>& webSourceInfos)
 {
     ASSERT(m_callback && !m_scheduledEventTimer.isActive());
 
     for (size_t i = 0; i < webSourceInfos.size(); ++i)
         m_sourceInfos.append(SourceInfo::create(webSourceInfos[i]));
 
     m_protect = this;
     m_scheduledEventTimer.startOneShot(0);
 }
 
 void MediaStreamTrackSourcesRequest::scheduledEventTimerFired(Timer<MediaStreamTrackSourcesRequest>*)
 {
     m_callback->handleEvent(m_sourceInfos);
     m_callback.clear();
     m_protect.release();
 }
 
 } // namespace WebCore