Replace scoped_ptr with std::unique_ptr in //ui

ui/ozone/platform/drm/gpu/drm_window.h

Index: ui/ozone/platform/drm/gpu/drm_window.h
diff --git a/ui/ozone/platform/drm/gpu/drm_window.h b/ui/ozone/platform/drm/gpu/drm_window.h
index 59407a5704359d593e088fae603a9e4b6d1cc866..84ee2554958f6b1a432bc951af6db0c5e1d55c35 100644
--- a/ui/ozone/platform/drm/gpu/drm_window.h
+++ b/ui/ozone/platform/drm/gpu/drm_window.h
@@ -118,7 +118,7 @@ class DrmWindow {
   // The controller associated with the current window. This may be nullptr if
   // the window isn't over an active display.
   HardwareDisplayController* controller_ = nullptr;
-  scoped_ptr<DrmOverlayValidator> overlay_validator_;
+  std::unique_ptr<DrmOverlayValidator> overlay_validator_;
 
   base::RepeatingTimer cursor_timer_;