Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. 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
@@ skipping 24 matching lines @@
 #include "modules/mediastream/MediaStream.h"
 #include "modules/mediastream/MediaStreamTrackSourcesCallback.h"
 #include "modules/mediastream/MediaStreamTrackSourcesRequestImpl.h"
 #include "modules/mediastream/MediaTrackSettings.h"
 #include "modules/mediastream/UserMediaController.h"
 #include "platform/mediastream/MediaStreamCenter.h"
 #include "platform/mediastream/MediaStreamComponent.h"
 #include "public/platform/WebMediaStreamTrack.h"
 #include "public/platform/WebSourceInfo.h"
 #include "wtf/Assertions.h"
-#include <memory>
 
 namespace blink {
 
 MediaStreamTrack* MediaStreamTrack::create(ExecutionContext* context, MediaStreamComponent* component)
 {
     MediaStreamTrack* track = new MediaStreamTrack(context, component);
     track->suspendIfNeeded();
     return track;
 }
 
@@ skipping 193 matching lines @@
     // while finalizing m_component. Which dispatches an 'ended' event,
     // referring to this object as the target. If this object is then GCed
     // at the same time, v8 objects will retain (wrapper) references to
     // this dead MediaStreamTrack object. Bad.
     //
     // Hence insisting on keeping this object alive until the 'ended'
     // state has been reached & handled.
     return !ended() && hasEventListeners(EventTypeNames::ended);
 }
 
-std::unique_ptr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource()
+PassOwnPtr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource()
 {
     return MediaStreamCenter::instance().createWebAudioSourceFromMediaStreamTrack(component());
 }
 
 void MediaStreamTrack::registerMediaStream(MediaStream* mediaStream)
 {
     CHECK(!m_isIteratingRegisteredMediaStreams);
     CHECK(!m_registeredMediaStreams.contains(mediaStream));
     m_registeredMediaStreams.add(mediaStream);
 }
@@ skipping 18 matching lines @@
 
 DEFINE_TRACE(MediaStreamTrack)
 {
     visitor->trace(m_registeredMediaStreams);
     visitor->trace(m_component);
     EventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink