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

third_party/WebKit/Source/platform/exported/WebMediaStream.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 35 matching lines @@
     ExtraDataContainer(PassOwnPtr<WebMediaStream::ExtraData> extraData) : m_extraData(extraData) { }
 
     WebMediaStream::ExtraData* extraData() { return m_extraData.get(); }
 
 private:
     OwnPtr<WebMediaStream::ExtraData> m_extraData;
 };
 
 } // namespace
 
-WebMediaStream::WebMediaStream(const PassRefPtr<MediaStreamDescriptor>& mediaStreamDescriptor)
-    : m_private(mediaStreamDescriptor)
-{
-}
-
 WebMediaStream::WebMediaStream(MediaStreamDescriptor* mediaStreamDescriptor)
     : m_private(mediaStreamDescriptor)
 {
 }
 
 void WebMediaStream::reset()
 {
     m_private.reset();
 }
 
@@ skipping 38 matching lines @@
     ASSERT(!isNull());
     m_private->addRemoteTrack(track);
 }
 
 void WebMediaStream::removeTrack(const WebMediaStreamTrack& track)
 {
     ASSERT(!isNull());
     m_private->removeRemoteTrack(track);
 }
 
-WebMediaStream& WebMediaStream::operator=(const PassRefPtr<MediaStreamDescriptor>& mediaStreamDescriptor)
+WebMediaStream& WebMediaStream::operator=(MediaStreamDescriptor* mediaStreamDescriptor)
 {
     m_private = mediaStreamDescriptor;
     return *this;
 }
 
-WebMediaStream::operator PassRefPtr<MediaStreamDescriptor>() const
-{
-    return m_private.get();
-}
-
 WebMediaStream::operator MediaStreamDescriptor*() const
 {
     return m_private.get();
 }
 
 void WebMediaStream::initialize(const WebVector<WebMediaStreamTrack>& audioTracks, const WebVector<WebMediaStreamTrack>& videoTracks)
 {
     initialize(createCanonicalUUIDString(), audioTracks, videoTracks);
 }
 
@@ skipping 10 matching lines @@
     }
     m_private = MediaStreamDescriptor::create(label, audio, video);
 }
 
 void WebMediaStream::assign(const WebMediaStream& other)
 {
     m_private = other.m_private;
 }
 
 } // namespace blink