tracing: Make ConvertableToTraceFormat move-only scoped_ptr

base/test/test_pending_task.cc

Index: base/test/test_pending_task.cc
diff --git a/base/test/test_pending_task.cc b/base/test/test_pending_task.cc
index 7347e45b884e26dd084bd06f865cd0ba2ec2f768..d912df4e22074b458d1b37cac3937e264271e5a7 100644
--- a/base/test/test_pending_task.cc
+++ b/base/test/test_pending_task.cc
@@ -52,12 +52,12 @@ void TestPendingTask::AsValueInto(base::trace_event::TracedValue* state) const {
   state->SetInteger("delay", delay.ToInternalValue());
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 TestPendingTask::AsValue() const {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  scoped_ptr<base::trace_event::TracedValue> state(
+      new base::trace_event::TracedValue());
   AsValueInto(state.get());
-  return state;
+  return std::move(state);
 }
 
 std::string TestPendingTask::ToString() const {