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 bbb2c407426f4f6f935f1ac6ecd0c3a0967128ba..21d729877de054b1063d54fa40a7c787e8fa0b11 100644
--- a/ui/ozone/platform/dri/gbm_surface_factory.cc
+++ b/ui/ozone/platform/dri/gbm_surface_factory.cc
@@ -90,6 +90,11 @@ 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[] = {