Re-upload - Fix crash when we don't have a plane to display

ui/ozone/platform/dri/hardware_display_controller.cc

Index: ui/ozone/platform/dri/hardware_display_controller.cc
diff --git a/ui/ozone/platform/dri/hardware_display_controller.cc b/ui/ozone/platform/dri/hardware_display_controller.cc
index 7ba5201fd3c87e7c856740be558039458855bdf3..2c7523d3b5e16cbf47b1639ce6d6e984cc457d6c 100644
--- a/ui/ozone/platform/dri/hardware_display_controller.cc
+++ b/ui/ozone/platform/dri/hardware_display_controller.cc
@@ -74,11 +74,11 @@ bool HardwareDisplayController::Modeset(const OverlayPlane& primary,
 bool HardwareDisplayController::Enable() {
   TRACE_EVENT0("dri", "HDC::Enable");
   DCHECK(!current_planes_.empty());
-  OverlayPlane primary = OverlayPlane::GetPrimaryPlane(current_planes_);
-  DCHECK(primary.buffer.get());
+  const OverlayPlane* primary = OverlayPlane::GetPrimaryPlane(current_planes_);
+  DCHECK(primary->buffer.get());
   bool status = true;
   for (size_t i = 0; i < crtc_controllers_.size(); ++i)
-    status &= crtc_controllers_[i]->Modeset(primary, mode_);
+    status &= crtc_controllers_[i]->Modeset(*primary, mode_);
 
   return status;
 }