VaapiVideoAccelerator: make Vaapi accelerator work with ozone

ui/ozone/platform/dri/gbm_buffer.cc

Index: ui/ozone/platform/dri/gbm_buffer.cc
diff --git a/ui/ozone/platform/dri/gbm_buffer.cc b/ui/ozone/platform/dri/gbm_buffer.cc
index 8eaccbf0edb5bf0cc8e732ec0678281464ae4b5f..d9a9085fd54e77e83c70221429540253d1f2eb78 100644
--- a/ui/ozone/platform/dri/gbm_buffer.cc
+++ b/ui/ozone/platform/dri/gbm_buffer.cc
@@ -69,10 +69,8 @@ GbmPixmap::GbmPixmap(scoped_refptr<GbmBuffer> buffer)
 }
 
 bool GbmPixmap::Initialize(DriWrapper* dri) {
-  if (drmPrimeHandleToFD(dri->get_fd(),
-                         buffer_->GetHandle(),
-                         DRM_CLOEXEC,
-                         &dma_buf_)) {
+  dma_buf_ = gbm_bo_get_fd(buffer_->bo());
+  if (dma_buf_ < 0) {
     LOG(ERROR) << "Failed to export buffer to dma_buf";
     return false;
   }
@@ -86,7 +84,7 @@ GbmPixmap::~GbmPixmap() {
 }
 
 void* GbmPixmap::GetEGLClientBuffer() {
-  return NULL;
+  return buffer_->bo();
 }
 
 int GbmPixmap::GetDmaBufFd() {