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

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

Index: third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
diff --git a/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp b/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
index b36b5253b9e2b5e039552014b1c3fe2db63a6125..a40a97eeec6d0fc2897f8df55c4116b3f8c3841c 100644
--- a/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
@@ -89,12 +89,12 @@ MediaStream* MediaStream::create(ExecutionContext* context, const MediaStreamTra
     return new MediaStream(context, audioTracks, videoTracks);
 }
 
-MediaStream* MediaStream::create(ExecutionContext* context, PassRefPtr<MediaStreamDescriptor> streamDescriptor)
+MediaStream* MediaStream::create(ExecutionContext* context, MediaStreamDescriptor* streamDescriptor)
 {
     return 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)
@@ -143,7 +143,7 @@ MediaStream::MediaStream(ExecutionContext* context, const MediaStreamTrackVector
 
     m_descriptor = MediaStreamDescriptor::create(audioComponents, videoComponents);
     m_descriptor->setClient(this);
-    MediaStreamCenter::instance().didCreateMediaStream(m_descriptor.get());
+    MediaStreamCenter::instance().didCreateMediaStream(m_descriptor);
 
     m_audioTracks = audioTracks;
     m_videoTracks = videoTracks;
@@ -427,6 +427,7 @@ DEFINE_TRACE(MediaStream)
 {
     visitor->trace(m_audioTracks);
     visitor->trace(m_videoTracks);
+    visitor->trace(m_descriptor);
     visitor->trace(m_scheduledEvents);
     RefCountedGarbageCollectedEventTargetWithInlineData<MediaStream>::trace(visitor);
     ContextLifecycleObserver::trace(visitor);