tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/shell_surface.cc

Index: components/exo/shell_surface.cc
diff --git a/components/exo/shell_surface.cc b/components/exo/shell_surface.cc
index 5e2e9eb795a6dc3b62878edd892cce27059b0c24..9807945fa30d09cdea00e71026a02fa8d000d06a 100644
--- a/components/exo/shell_surface.cc
+++ b/components/exo/shell_surface.cc
@@ -229,10 +229,8 @@ Surface* ShellSurface::GetMainSurface(const aura::Window* window) {
   return window->GetProperty(kMainSurfaceKey);
 }
 
-scoped_refptr<base::trace_event::TracedValue> ShellSurface::AsTracedValue()
-    const {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue;
+scoped_ptr<base::trace_event::TracedValue> ShellSurface::AsTracedValue() const {
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue);
   value->SetString("title", base::UTF16ToUTF8(title_));
   value->SetString("application_id", application_id_);
   return value;