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

third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp

Index: third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp
diff --git a/third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp b/third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp
index f03a996183f450ece8d3b3a900a4892afde9c4bf..8fea4d3f6778c7d1f2d5d107682ccf1b7e3dde36 100644
--- a/third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp
+++ b/third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp
@@ -34,9 +34,9 @@
 
 namespace blink {
 
-PassRefPtr<MediaStreamSource> MediaStreamSource::create(const String& id, Type type, const String& name, bool remote, bool readonly, ReadyState readyState, bool requiresConsumer)
+MediaStreamSource* MediaStreamSource::create(const String& id, Type type, const String& name, bool remote, bool readonly, ReadyState readyState, bool requiresConsumer)
 {
-    return adoptRef(new MediaStreamSource(id, type, name, remote, readonly, readyState, requiresConsumer));
+    return new MediaStreamSource(id, type, name, remote, readonly, readyState, requiresConsumer);
 }
 
 MediaStreamSource::MediaStreamSource(const String& id, Type type, const String& name, bool remote, bool readonly, ReadyState readyState, bool requiresConsumer)
@@ -105,4 +105,9 @@ void MediaStreamSource::consumeAudio(AudioBus* bus, size_t numberOfFrames)
         (*it)->consumeAudio(bus, numberOfFrames);
 }
 
+DEFINE_TRACE(MediaStreamSource)
+{
+    visitor->trace(m_audioConsumers);
+}
+
 } // namespace blink