Reland: [Oilpan] Move MediaStream{Source|Component|Descriptor} to Oilpan heap

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

 /*
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  * 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 131 matching lines @@
 
     return 0;
 }
 
 void UserMediaRequest::start()
 {
     if (m_controller)
         m_controller->requestUserMedia(this);
 }
 
-void UserMediaRequest::succeed(PassRefPtr<MediaStreamDescriptor> streamDescriptor)
+void UserMediaRequest::succeed(MediaStreamDescriptor* streamDescriptor)
 {
     if (!executionContext())
         return;
 
     RefPtrWillBeRawPtr<MediaStream> stream = MediaStream::create(executionContext(), streamDescriptor);
 
     MediaStreamTrackVector audioTracks = stream->getAudioTracks();
     for (MediaStreamTrackVector::iterator iter = audioTracks.begin(); iter != audioTracks.end(); ++iter) {
         (*iter)->component()->source()->setConstraints(m_audio);
     }
@@ skipping 41 matching lines @@
 
 DEFINE_TRACE(UserMediaRequest)
 {
     visitor->trace(m_controller);
     visitor->trace(m_successCallback);
     visitor->trace(m_errorCallback);
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink