Use the DrmDeviceManager to get the primary device in GbmSurfaceFactory

ui/ozone/platform/dri/gbm_surface_factory.cc

Index: ui/ozone/platform/dri/gbm_surface_factory.cc
diff --git a/ui/ozone/platform/dri/gbm_surface_factory.cc b/ui/ozone/platform/dri/gbm_surface_factory.cc
index cc7260f2f14a9104c004bd50521def33f5ffc848..9742541322c3c31aeaecade8db9277aef8d529f2 100644
--- a/ui/ozone/platform/dri/gbm_surface_factory.cc
+++ b/ui/ozone/platform/dri/gbm_surface_factory.cc
@@ -75,26 +75,20 @@ GbmSurfaceFactory::GbmSurfaceFactory(bool allow_surfaceless)
 GbmSurfaceFactory::~GbmSurfaceFactory() {}
 
 void GbmSurfaceFactory::InitializeGpu(
-    const scoped_refptr<GbmWrapper>& gbm,
     DrmDeviceManager* drm_device_manager,
     DriWindowDelegateManager* window_manager) {
-  gbm_ = gbm;
   drm_device_manager_ = drm_device_manager;
   window_manager_ = window_manager;
 }
 
 intptr_t GbmSurfaceFactory::GetNativeDisplay() {
-#if defined(USE_MESA_PLATFORM_NULL)
   return EGL_DEFAULT_DISPLAY;
-#else
-  DCHECK(gbm_);
-  return reinterpret_cast<intptr_t>(gbm_->device());
-#endif
 }
 
 int GbmSurfaceFactory::GetDrmFd() {
-  DCHECK(gbm_);
-  return gbm_->get_fd();
+  scoped_refptr<GbmWrapper> gbm = GetGbmDevice(gfx::kNullAcceleratedWidget);
+  DCHECK(gbm);
+  return gbm->get_fd();
 }
 
 const int32* GbmSurfaceFactory::GetEGLSurfaceProperties(