[8/8][Ozone-Dri] Pass DRM FD to GPU process on hotplug event

ui/ozone/platform/dri/drm_device_generator.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_OZONE_PLATFORM_DRI_DRM_DEVICE_GENERATOR_H_
+#define UI_OZONE_PLATFORM_DRI_DRM_DEVICE_GENERATOR_H_
+
+#include "base/files/file.h"
+#include "base/memory/ref_counted.h"
+
+namespace ui {
+
+class DriWrapper;
+
+class DrmDeviceGenerator {
+ public:
+  DrmDeviceGenerator();
+  virtual ~DrmDeviceGenerator();
+
+  // Creates a DRM device for |file|. |device_path| describes the location of
+  // the DRM device.
+  virtual scoped_refptr<DriWrapper> CreateDevice(
+      const base::FilePath& device_path,
+      base::File file);
+
+ public:
+  DISALLOW_COPY_AND_ASSIGN(DrmDeviceGenerator);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_DRM_DEVICE_GENERATOR_H_