tracing: Make ConvertableToTraceFormat move-only scoped_ptr

ui/events/latency_info.h

Index: ui/events/latency_info.h
diff --git a/ui/events/latency_info.h b/ui/events/latency_info.h
index 31a105584612e80816121ab820dfb661820d309e..60e255fec795c509a5fc1949a16f90996238075c 100644
--- a/ui/events/latency_info.h
+++ b/ui/events/latency_info.h
@@ -216,9 +216,9 @@ class EVENTS_BASE_EXPORT LatencyInfo {
                                          const char* trace_name_str);
 
   // Converts latencyinfo into format that can be dumped into trace buffer.
-  scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsTraceableData();
-  scoped_refptr<base::trace_event::ConvertableToTraceFormat>
-    CoordinatesAsTraceableData();
+  scoped_ptr<base::trace_event::ConvertableToTraceFormat> AsTraceableData();
+  scoped_ptr<base::trace_event::ConvertableToTraceFormat>
+  CoordinatesAsTraceableData();
 
   // Shown as part of the name of the trace event for this LatencyInfo.
   // String is empty if no tracing is enabled.