VaapiVideoAccelerator: make Vaapi accelerator work with ozone

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 509fe5f31bcac8f65730014d805308f9fdf9d019..e2a53c60546d34a2aedd0aa7664f56e35c7351f4 100644
--- a/ui/ozone/platform/dri/gbm_surface_factory.cc
+++ b/ui/ozone/platform/dri/gbm_surface_factory.cc
@@ -89,6 +89,11 @@ intptr_t GbmSurfaceFactory::GetNativeDisplay() {
   return reinterpret_cast<intptr_t>(device_);
 }
 
+int GbmSurfaceFactory::GetDrmFd() {
+  DCHECK(state_ == INITIALIZED);
+  return gbm_device_get_fd(device_);
+}
+
 const int32* GbmSurfaceFactory::GetEGLSurfaceProperties(
     const int32* desired_list) {
   static const int32 kConfigAttribs[] = {