tracing: Make ConvertableToTraceFormat move-only scoped_ptr

third_party/WebKit/Source/platform/TracedValue.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TracedValue_h
 #define TracedValue_h
 
 #include "base/memory/ref_counted.h"
 #include "platform/EventTracer.h"
 #include "wtf/PassOwnPtr.h"
@@ skipping 33 matching lines @@
     void beginArray();
     void beginDictionary();
 
     String toString() const;
 
 private:
     TracedValue();
 
     // This will be moved (and become null) when TracedValue is passed to
     // EventTracer::addTraceEvent().
-    scoped_refptr<base::trace_event::TracedValue> m_tracedValue;
+    scoped_ptr<base::trace_event::TracedValue> m_tracedValue;
 
     friend class EventTracer;
 };
 
 } // namespace blink
 
 #endif // TracedValue_h