Move mediastream module to oilpan transition types

Source/platform/mediastream/RTCStatsResponseBase.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
 
 #ifndef RTCStatsResponseBase_h
 #define RTCStatsResponseBase_h
 
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class RTCStatsResponseBase : public RefCounted<RTCStatsResponseBase> {
+class RTCStatsResponseBase : public RefCountedWillBeGarbageCollectedFinalized<RTCStatsResponseBase> {
 public:
     virtual ~RTCStatsResponseBase() { }
 
     virtual size_t addReport(String id, String type, double timestamp) = 0;
     virtual void addStatistic(size_t report, String name, String value) = 0;
+
+    virtual void trace(Visitor*) = 0;
 };
 
 } // namespace WebCore
 
 #endif // RTCStatsResponseBase_h