tracing: Make ConvertableToTraceFormat move-only scoped_ptr

base/test/test_pending_task.h

Index: base/test/test_pending_task.h
diff --git a/base/test/test_pending_task.h b/base/test/test_pending_task.h
index df5eadecd21cac86505c08cefbdda4b229b747bb..3b299614da344d8024322e017617f514cbe9b3e0 100644
--- a/base/test/test_pending_task.h
+++ b/base/test/test_pending_task.h
@@ -59,7 +59,7 @@ struct TestPendingTask {
   // Functions for using test pending task with tracing, useful in unit
   // testing.
   void AsValueInto(base::trace_event::TracedValue* state) const;
-  scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
+  scoped_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
   std::string ToString() const;
 };