[2/4]Allow hotplugging of primary DRM device

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

Index: ui/ozone/platform/drm/gpu/drm_surface_unittest.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_surface_unittest.cc b/ui/ozone/platform/drm/gpu/drm_surface_unittest.cc
index 1aaa4e36393c648a39e8291c6fe00800347b7855..29a41afbf55759f3085f0d1446c183169eecd8de 100644
--- a/ui/ozone/platform/drm/gpu/drm_surface_unittest.cc
+++ b/ui/ozone/platform/drm/gpu/drm_surface_unittest.cc
@@ -9,6 +9,7 @@
 #include "third_party/skia/include/core/SkDevice.h"
 #include "ui/ozone/platform/drm/gpu/crtc_controller.h"
 #include "ui/ozone/platform/drm/gpu/drm_buffer.h"
+#include "ui/ozone/platform/drm/gpu/drm_device_generator.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
 #include "ui/ozone/platform/drm/gpu/drm_surface.h"
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
@@ -60,7 +61,7 @@ void DrmSurfaceTest::SetUp() {
   screen_manager_->ConfigureDisplayController(
       drm_, kDefaultCrtc, kDefaultConnector, gfx::Point(), kDefaultMode);
 
-  drm_device_manager_.reset(new ui::DrmDeviceManager(drm_));
+  drm_device_manager_.reset(new ui::DrmDeviceManager(nullptr));
   scoped_ptr<ui::DrmWindow> window(new ui::DrmWindow(
       kDefaultWidgetHandle, drm_device_manager_.get(), screen_manager_.get()));
   window->Initialize();