NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

ui/ozone/public/platform/drm_intel_buffer_manager.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_PUBLIC_PLATFORM_DRM_INTEL_BUFFER_MANAGER_H_
+#define UI_OZONE_PUBLIC_PLATFORM_DRM_INTEL_BUFFER_MANAGER_H_
+
+#include "base/file_descriptor_posix.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "ui/ozone/ozone_export.h"
+
+typedef struct _drm_intel_bufmgr drm_intel_bufmgr;
+
+namespace ui {
+
+class OZONE_EXPORT DrmIntelBufferManager {
+ public:
+  DrmIntelBufferManager();
+  ~DrmIntelBufferManager();
+  bool Initialize(const base::FileDescriptor& device_fd);
+  drm_intel_bufmgr* buffer_manager() const;
+  int device_fd() const;
+
+ private:
+  base::FileDescriptor device_fd_;
+  drm_intel_bufmgr* buffer_manager_;
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(DrmIntelBufferManager);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_PLATFORM_DRM_INTEL_BUFFER_MANAGER_H_