tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/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_SURFACE_H_
 #define COMPONENTS_EXO_SURFACE_H_
 
 #include <list>
 #include <utility>
 
@@ skipping 105 matching lines @@
   // Returns true if surface has been assigned a surface delegate.
   bool HasSurfaceDelegate() const;
 
   // Surface does not own observers. It is the responsibility of the observer
   // to remove itself when it is done observing.
   void AddSurfaceObserver(SurfaceObserver* observer);
   void RemoveSurfaceObserver(SurfaceObserver* observer);
   bool HasSurfaceObserver(const SurfaceObserver* observer) const;
 
   // 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;
 
   bool HasPendingDamageForTesting(const gfx::Rect& damage) const {
     return pending_damage_.contains(gfx::RectToSkIRect(damage));
   }
 
   // Overridden from aura::WindowObserver:
   void OnWindowAddedToRootWindow(aura::Window* window) override;
   void OnWindowRemovingFromRootWindow(aura::Window* window,
                                       aura::Window* new_root) override;
 
@@ skipping 81 matching lines @@
 
   // Surface observer list. Surface does not own the observers.
   base::ObserverList<SurfaceObserver, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SURFACE_H_