[Ozone-Dri] Do not call AddFramebuffer with cursor buffers

ui/ozone/platform/dri/dri_buffer.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_DRI_BUFFER_H_
 #define UI_OZONE_PLATFORM_DRI_DRI_BUFFER_H_
 
 #include "base/macros.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkSurface.h"
 #include "ui/ozone/ozone_export.h"
 #include "ui/ozone/platform/dri/scanout_buffer.h"
 
 namespace ui {
 
 class DriWrapper;
 
 // Wrapper for a DRM allocated buffer. Keeps track of the native properties of
 // the buffer and wraps the pixel memory into a SkSurface which can be used to
 // draw into using Skia.
 class OZONE_EXPORT DriBuffer : public ScanoutBuffer {
  public:
   DriBuffer(const scoped_refptr<DriWrapper>& dri);
 
   // Allocates the backing pixels and wraps them in |surface_|. |info| is used
-  // to describe the buffer characteristics (size, color format).
-  bool Initialize(const SkImageInfo& info);
+  // to describe the buffer characteristics (size, color format). |is_scanout|
+  // is used to distinguish the buffers that are used for modesetting.
+  bool Initialize(const SkImageInfo& info, bool is_scanout);
 
   SkCanvas* GetCanvas() const;
 
   // ScanoutBuffer:
   uint32_t GetFramebufferId() const override;
   uint32_t GetHandle() const override;
   gfx::Size GetSize() const override;
 
  protected:
   ~DriBuffer() override;
@@ skipping 25 matching lines @@
   scoped_refptr<ScanoutBuffer> Create(const scoped_refptr<DriWrapper>& drm,
                                       const gfx::Size& size) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DriBufferGenerator);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_DRI_BUFFER_H_