drm: GPU process manages VGEM fd.

ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc

Index: ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc b/ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc
index 9a730bca3e8e86d35f22ada8e98d844aabf32cb2..c0f90ff77300ff943a03b2ae457050553bf9255d 100644
--- a/ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc
+++ b/ui/ozone/platform/drm/gpu/drm_gpu_platform_support.cc
@@ -214,6 +214,7 @@ bool DrmGpuPlatformSupport::OnMessageReceived(const IPC::Message& message) {
                       OnRelinquishDisplayControl)
   IPC_MESSAGE_HANDLER(OzoneGpuMsg_AddGraphicsDevice, OnAddGraphicsDevice)
   IPC_MESSAGE_HANDLER(OzoneGpuMsg_RemoveGraphicsDevice, OnRemoveGraphicsDevice)
+  IPC_MESSAGE_HANDLER(OzoneGpuMsg_AddVgemDevice, OnAddVgemDevice)
   IPC_MESSAGE_HANDLER(OzoneGpuMsg_GetHDCPState, OnGetHDCPState)
   IPC_MESSAGE_HANDLER(OzoneGpuMsg_SetHDCPState, OnSetHDCPState)
   IPC_MESSAGE_HANDLER(OzoneGpuMsg_SetGammaRamp, OnSetGammaRamp);
@@ -295,6 +296,11 @@ void DrmGpuPlatformSupport::OnRemoveGraphicsDevice(const base::FilePath& path) {
   drm_device_manager_->RemoveDrmDevice(path);
 }
 
+void DrmGpuPlatformSupport::OnAddVgemDevice(const base::FilePath& path,
+                                            const base::FileDescriptor& fd) {
+  drm_device_manager_->AddVgemDevice(path, fd);
+}
+
 void DrmGpuPlatformSupport::OnSetGammaRamp(
     int64_t id,
     const std::vector<GammaRampRGBEntry>& lut) {