tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/buffer.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_BUFFER_H_
 #define COMPONENTS_EXO_BUFFER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 45 matching lines @@
   // be called before a new texture mailbox can be acquired unless
   // |lost_context| is true.
   scoped_ptr<cc::SingleReleaseCallback> ProduceTextureMailbox(
       cc::TextureMailbox* mailbox,
       bool lost_context);
 
   // Returns the size of the buffer.
   gfx::Size GetSize() const;
 
   // Returns a trace value representing the state of the buffer.
-  scoped_refptr<base::trace_event::TracedValue> AsTracedValue() const;
+  scoped_ptr<base::trace_event::TracedValue> AsTracedValue() const;
 
  private:
   class Texture;
 
   // Decrements the use count of buffer and notifies the client that buffer
   // as been released if it reached 0.
   void Release();
 
   // This is used by ProduceTextureMailbox() to produce a release callback
   // that releases a texture so it can be destroyed or reused.
@@ skipping 31 matching lines @@
 
   // The client release callback.
   base::Closure release_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Buffer);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_BUFFER_H_