[Ozone-DRI] Adding ScanoutBuffer interface

ui/ozone/platform/dri/gbm_surface.h

 // Copyright 2014 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_OZONE_PLATFORM_DRI_GBM_SURFACE_H_
 #define UI_OZONE_PLATFORM_DRI_GBM_SURFACE_H_
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
+#include "base/memory/ref_counted.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/ozone/platform/dri/scanout_surface.h"
 
 struct gbm_bo;
 struct gbm_device;
 struct gbm_surface;
 
 namespace ui {
 
 class DriBuffer;
@@ skipping 31 matching lines @@
   // current backbuffer that is pending scan out.
   gbm_bo* buffers_[2];
 
   // Index to the front buffer.
   int front_buffer_;
 
   // We can't lock (and get) an accelerated buffer from the GBM surface until
   // after something draws into it. But modesetting needs to happen earlier,
   // before an actual window is created and draws. So, we create a dumb buffer
   // for this purpose.
-  scoped_ptr<DriBuffer> dumb_buffer_;
+  scoped_refptr<DriBuffer> dumb_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurface);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_GBM_SURFACE_H_