It is time.

ui/ozone/platform_object.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_OBJECT_H_
-#define UI_OZONE_PLATFORM_OBJECT_H_
-
-#include "base/memory/scoped_ptr.h"
-
-namespace ui {
-
-// Create an instance of platform specific object.
-//
-// This calls a static constructor function based on the --ozone-platform flag.
-//
-// For the platform called "foo", PlatformObject<PlatformWidget> will ultimately
-// call the function with signature
-//
-//   PlatformWidget* CreatePlatformWidgetFoo();
-//
-// A definition of this function for each compiled platform must be provided, or
-// link errors will result.
-//
-// To find the right constructor function, this uses static data defined in the
-// source file generated by the generate_constructor_list.py.
-template <class T>
-class PlatformObject {
- public:
-  static scoped_ptr<T> Create();
-};
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_OBJECT_H_