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

ui/ozone/platform/dri/dri_buffer.h

Index: ui/ozone/platform/dri/dri_buffer.h
diff --git a/ui/ozone/platform/dri/dri_buffer.h b/ui/ozone/platform/dri/dri_buffer.h
index a558ac1462edb5d9a7e16fa1df6fafad86e24ac2..ce18406a5bfacafe59d4c5a9911cfd40acf4d0c5 100644
--- a/ui/ozone/platform/dri/dri_buffer.h
+++ b/ui/ozone/platform/dri/dri_buffer.h
@@ -23,8 +23,9 @@ class OZONE_EXPORT DriBuffer : public ScanoutBuffer {
   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;