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

Source/modules/mediastream/RTCStatsRequestImpl.cpp

Index: Source/modules/mediastream/RTCStatsRequestImpl.cpp
diff --git a/Source/modules/mediastream/RTCStatsRequestImpl.cpp b/Source/modules/mediastream/RTCStatsRequestImpl.cpp
index bd38dfd9a0d0b5090e3d8e9b99b5b57224a68905..5e4692e0c65a2e77579206b757ab7260df874d1e 100644
--- a/Source/modules/mediastream/RTCStatsRequestImpl.cpp
+++ b/Source/modules/mediastream/RTCStatsRequestImpl.cpp
@@ -88,6 +88,7 @@ void RTCStatsRequestImpl::clear()
 void RTCStatsRequestImpl::trace(Visitor* visitor)
 {
     visitor->trace(m_successCallback);
+    visitor->trace(m_component);
     visitor->trace(m_requester);
     RTCStatsRequest::trace(visitor);
 }