drm: GPU process manages VGEM fd.

ui/ozone/platform/drm/host/drm_device_handle.cc

Index: ui/ozone/platform/drm/host/drm_device_handle.cc
diff --git a/ui/ozone/platform/drm/host/drm_device_handle.cc b/ui/ozone/platform/drm/host/drm_device_handle.cc
index 8d9fc0c53af256964ff95b8175229814145ae113..ccfceaa396dec491d1f001caba2ca84ab4527ab0 100644
--- a/ui/ozone/platform/drm/host/drm_device_handle.cc
+++ b/ui/ozone/platform/drm/host/drm_device_handle.cc
@@ -26,7 +26,7 @@ bool Authenticate(int fd) {
 
 }  // namespace
 
-DrmDeviceHandle::DrmDeviceHandle() {
+DrmDeviceHandle::DrmDeviceHandle() : is_vgem_(false) {
 }
 
 DrmDeviceHandle::~DrmDeviceHandle() {
@@ -34,9 +34,10 @@ DrmDeviceHandle::~DrmDeviceHandle() {
     base::ThreadRestrictions::AssertIOAllowed();
 }
 
-bool DrmDeviceHandle::Initialize(const base::FilePath& path) {
+bool DrmDeviceHandle::Initialize(const base::FilePath& path, bool is_vgem) {
   CHECK(path.DirName() == base::FilePath("/dev/dri"));
   base::ThreadRestrictions::AssertIOAllowed();
+  is_vgem_ = is_vgem;
   bool print_warning = true;
   while (true) {
     file_.reset();
@@ -47,6 +48,8 @@ bool DrmDeviceHandle::Initialize(const base::FilePath& path) {
     }
 
     file_.reset(fd);
+    if (is_vgem_)
+      break;
 
     if (Authenticate(file_.get()))
       break;