[Ozone-DRI] Migrate cursor to using ScanoutBuffer

ui/ozone/platform/dri/hardware_display_controller.h

Index: ui/ozone/platform/dri/hardware_display_controller.h
diff --git a/ui/ozone/platform/dri/hardware_display_controller.h b/ui/ozone/platform/dri/hardware_display_controller.h
index cee71f8b0e389fd9991dd401a2f7ab055d1877b9..000c40c32ae4a2a7c83b72a1a208b36e320b337b 100644
--- a/ui/ozone/platform/dri/hardware_display_controller.h
+++ b/ui/ozone/platform/dri/hardware_display_controller.h
@@ -22,6 +22,7 @@ class Point;
 namespace ui {
 
 class NativePixmap;
+class ScanoutBuffer;
 class ScanoutSurface;
 
 typedef std::vector<scoped_refptr<NativePixmap> > NativePixmapList;
@@ -150,7 +151,7 @@ class HardwareDisplayController
                        unsigned int useconds);
 
   // Set the hardware cursor to show the contents of |surface|.
-  bool SetCursor(ScanoutSurface* surface);
+  bool SetCursor(scoped_refptr<ScanoutBuffer> buffer);
 
   bool UnsetCursor();
 
@@ -187,6 +188,8 @@ class HardwareDisplayController
 
   scoped_ptr<ScanoutSurface> surface_;
 
+  scoped_refptr<ScanoutBuffer> cursor_buffer_;
+
   uint64_t time_of_last_flip_;
 
   // Keeps track of the CRTC state. If a surface has been bound, then the value