Oilpan: Move MediaStreamSource, MediaStreamComponent and MediaStreamDescriptor to oilpan's heap

Source/modules/mediastream/MediaStream.cpp

Index: Source/modules/mediastream/MediaStream.cpp
diff --git a/Source/modules/mediastream/MediaStream.cpp b/Source/modules/mediastream/MediaStream.cpp
index 79d077aed95068468342767f2257d9627e6574fd..986f75ff8023d3b5c41eda65e9698ea7af3235be 100644
--- a/Source/modules/mediastream/MediaStream.cpp
+++ b/Source/modules/mediastream/MediaStream.cpp
@@ -89,12 +89,12 @@ MediaStream* MediaStream::create(ExecutionContext* context, const MediaStreamTra
     return adoptRefCountedGarbageCollectedWillBeNoop(new MediaStream(context, audioTracks, videoTracks));
 }
 
-MediaStream* MediaStream::create(ExecutionContext* context, PassRefPtr<MediaStreamDescriptor> streamDescriptor)
+MediaStream* MediaStream::create(ExecutionContext* context, MediaStreamDescriptor* streamDescriptor)
 {
     return adoptRefCountedGarbageCollectedWillBeNoop(new MediaStream(context, streamDescriptor));
 }
 
-MediaStream::MediaStream(ExecutionContext* context, PassRefPtr<MediaStreamDescriptor> streamDescriptor)
+MediaStream::MediaStream(ExecutionContext* context, MediaStreamDescriptor* streamDescriptor)
     : ContextLifecycleObserver(context)
     , m_stopped(false)
     , m_descriptor(streamDescriptor)
@@ -147,7 +147,6 @@ MediaStream::MediaStream(ExecutionContext* context, const MediaStreamTrackVector
 
 MediaStream::~MediaStream()
 {
-    m_descriptor->setClient(0);
 }
 
 bool MediaStream::ended() const
@@ -392,7 +391,9 @@ void MediaStream::trace(Visitor* visitor)
     visitor->trace(m_audioTracks);
     visitor->trace(m_videoTracks);
     visitor->trace(m_scheduledEvents);
+    visitor->trace(m_descriptor);
     EventTargetWithInlineData::trace(visitor);
+    MediaStreamDescriptorClient::trace(visitor);
 }
 
 } // namespace blink