ozone: Add an opaque fb to ScanoutBuffer for primary planes.

ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc

Index: ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc
diff --git a/ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc b/ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc
index e3a2b28595edf7de145a172381c6074e3c53ae18..17bdd2acf7df475c8e880ba41e1c08dbfa7b5771 100644
--- a/ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc
+++ b/ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.cc
@@ -95,8 +95,11 @@ bool HardwareDisplayPlaneManagerAtomic::SetPlaneData(
     CrtcController* crtc) {
   HardwareDisplayPlaneAtomic* atomic_plane =
       static_cast<HardwareDisplayPlaneAtomic*>(hw_plane);
+  uint32_t framebuffer_id = overlay.z_order
+                                ? overlay.buffer->GetFramebufferId()
+                                : overlay.buffer->GetOpaqueFramebufferId();
   if (!atomic_plane->SetPlaneData(plane_list->atomic_property_set.get(),
-                                  crtc_id, overlay.buffer->GetFramebufferId(),
+                                  crtc_id, framebuffer_id,
                                   overlay.display_bounds, src_rect)) {
     LOG(ERROR) << "Failed to set plane properties";
     return false;