tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/sub_surface.h

 // Copyright 2015 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 COMPONENTS_EXO_SUB_SURFACE_H_
 #define COMPONENTS_EXO_SUB_SURFACE_H_
 
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "components/exo/surface_delegate.h"
 #include "components/exo/surface_observer.h"
 #include "ui/gfx/geometry/point.h"
 
 namespace base {
 namespace trace_event {
 class TracedValue;
 }
 }
 
@@ skipping 18 matching lines @@
   void PlaceAbove(Surface* reference);
 
   // This removes sub-surface from the stack, and puts it back just below the
   // sibling surface.
   void PlaceBelow(Surface* sibiling);
 
   // Change the commit behaviour of the sub-surface.
   void SetCommitBehavior(bool synchronized);
 
   // Returns a trace value representing the state of the surface.
-  scoped_refptr<base::trace_event::TracedValue> AsTracedValue() const;
+  scoped_ptr<base::trace_event::TracedValue> AsTracedValue() const;
 
   // Overridden from SurfaceDelegate:
   void OnSurfaceCommit() override;
   bool IsSurfaceSynchronized() const override;
 
   // Overridden from SurfaceObserver:
   void OnSurfaceDestroying(Surface* surface) override;
 
  private:
   Surface* surface_;
   Surface* parent_;
   bool is_synchronized_;
 
   DISALLOW_COPY_AND_ASSIGN(SubSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SUB_SURFACE_H_