tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/surface.cc

Index: components/exo/surface.cc
diff --git a/components/exo/surface.cc b/components/exo/surface.cc
index f5c3860d24325825d57a83c60e8552dfef55927c..e67ca09359dc2c2c40a27a0ff7f12a5acec33014 100644
--- a/components/exo/surface.cc
+++ b/components/exo/surface.cc
@@ -443,9 +443,8 @@ bool Surface::HasSurfaceObserver(const SurfaceObserver* observer) const {
   return observers_.HasObserver(observer);
 }
 
-scoped_refptr<base::trace_event::TracedValue> Surface::AsTracedValue() const {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue;
+scoped_ptr<base::trace_event::TracedValue> Surface::AsTracedValue() const {
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue);
   value->SetString("name", layer()->name());
   return value;
 }