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 56351dda4d83b0671a9896ee02c04a894c87fe69..32860cf7bff4cf2ae95befd592c49a0fc1c35888 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);
 }