ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc

Index: ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
diff --git a/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc b/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
index 4502fb3f5841e80e499f91e4472c6c53a6c2e949..4ba737f41cdd060d6be76ce5897d043579da20da 100644
--- a/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
+++ b/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
@@ -4,6 +4,8 @@
 
 #include "ui/ozone/platform/drm/common/native_pixmap_manager_gbm.h"
 
+#include "base/file_descriptor_posix.h"
+#include "base/files/scoped_file.h"
 #include "ui/ozone/public/native_pixmap_manager.h"
 
 namespace ui {
@@ -16,6 +18,11 @@ class NativePixmapManagerGbm : public NativePixmapManager {
   ~NativePixmapManagerGbm() override {}
 
   // NativePixmapManager:
+  void Initialize(const base::FileDescriptor& device_fd) override {
+    DCHECK_EQ(vgem_fd_.get(), -1);
+    if (device_fd.fd > 0)
+      vgem_fd_.reset(device_fd.fd);
+  }
   std::vector<Configuration> GetSupportedNativePixmapConfigurations()
       const override {
     std::vector<Configuration> configurations = {
@@ -25,6 +32,8 @@ class NativePixmapManagerGbm : public NativePixmapManager {
   }
 
  private:
+  base::ScopedFD vgem_fd_;
+
   DISALLOW_COPY_AND_ASSIGN(NativePixmapManagerGbm);
 };