tracing: Make ConvertableToTraceFormat move-only scoped_ptr

ui/events/latency_info.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_LATENCY_INFO_H_
 #define UI_EVENTS_LATENCY_INFO_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 197 matching lines @@
 
  private:
   void AddLatencyNumberWithTimestampImpl(LatencyComponentType component,
                                          int64_t id,
                                          int64_t component_sequence_number,
                                          base::TimeTicks time,
                                          uint32_t event_count,
                                          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.
   std::string trace_name_;
 
   LatencyMap latency_components_;
 
   // These coordinates represent window coordinates of the original input event.
   uint32_t input_coordinates_size_;
   InputCoordinate input_coordinates_[kMaxInputCoordinates];
 
   uint32_t coalesced_events_size_;
   double timestamps_of_coalesced_events_[kMaxCoalescedEventTimestamps];
 
   // The unique id for matching the ASYNC_BEGIN/END trace event.
   int64_t trace_id_;
   // Whether a terminal component has been added.
   bool terminated_;
 
   friend struct IPC::ParamTraits<ui::LatencyInfo>;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_LATENCY_INFO_H_