drm: GPU process manages VGEM fd.

ui/ozone/platform/drm/host/drm_display_host_manager.h

Index: ui/ozone/platform/drm/host/drm_display_host_manager.h
diff --git a/ui/ozone/platform/drm/host/drm_display_host_manager.h b/ui/ozone/platform/drm/host/drm_display_host_manager.h
index fbebd177f7fd310307b58e92e814c36e35803bfc..7f553c3fa6b226cb0a291f98f76454e9ae0d3ec2 100644
--- a/ui/ozone/platform/drm/host/drm_display_host_manager.h
+++ b/ui/ozone/platform/drm/host/drm_display_host_manager.h
@@ -70,11 +70,13 @@ class DrmDisplayHostManager : public DeviceEventObserver,
  private:
   struct DisplayEvent {
     DisplayEvent(DeviceEvent::ActionType action_type,
-                 const base::FilePath& path)
-        : action_type(action_type), path(path) {}
+                 const base::FilePath& path,
+                 bool is_vgem)
+        : action_type(action_type), path(path), is_vgem(is_vgem) {}
 
     DeviceEvent::ActionType action_type;
     base::FilePath path;
+    bool is_vgem;
   };
 
   void OnUpdateNativeDisplays(