It is time.

ui/ozone/platform/dri/dri_vsync_provider.h

-// Copyright 2014 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_IMPL_DRI_VSYNC_PROVIDER_H_
-#define UI_OZONE_PLATFORM_IMPL_DRI_VSYNC_PROVIDER_H_
-
-#include "ui/gfx/vsync_provider.h"
-
-namespace ui {
-
-class DriWindowDelegate;
-
-class DriVSyncProvider : public gfx::VSyncProvider {
- public:
-  DriVSyncProvider(DriWindowDelegate* window_delegate);
-  virtual ~DriVSyncProvider();
-
-  virtual void GetVSyncParameters(const UpdateVSyncCallback& callback) override;
-
- private:
-  DriWindowDelegate* window_delegate_;  // Not owned.
-
-  DISALLOW_COPY_AND_ASSIGN(DriVSyncProvider);
-};
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_IMPL_DRI_VSYNC_PROVIDER_H_