ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

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

Index: ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc
diff --git a/ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc b/ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc
index c73c4ddf10dce5c586d30b1d7a9247457d6e6756..cb00494b719771de4bb93d905bfdccc2055c5a86 100644
--- a/ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc
+++ b/ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc
@@ -14,7 +14,11 @@ namespace {
 class ClientNativePixmapManagerGbm : public ClientNativePixmapManager {
  public:
   ClientNativePixmapManagerGbm() {}
-  ~ClientNativePixmapManagerGbm() override {}
+  ~ClientNativePixmapManagerGbm() override {
+    if (vgem_fd_.auto_close) {
+      base::ScopedFD closing_fd(vgem_fd_.fd);
+    }
+  }
 
   // ClientNativePixmapManager:
   std::vector<Configuration> GetSupportedConfigurations() const override {
@@ -33,6 +37,14 @@ class ClientNativePixmapManagerGbm : public ClientNativePixmapManager {
   }
 
  private:
+  void Initialize(const base::FileDescriptor& virtual_device) override {
+    DCHECK_EQ(vgem_fd_.fd, -1);
+    if (virtual_device.fd >= 0)
+      vgem_fd_ = virtual_device;
+  }
+
+  base::FileDescriptor vgem_fd_;
+
   DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapManagerGbm);
 };