It is time.

ui/aura/client/screen_position_client.h

-// Copyright (c) 2012 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_AURA_SCREEN_POSITION_CLIENT_H_
-#define UI_AURA_SCREEN_POSITION_CLIENT_H_
-
-#include "ui/aura/aura_export.h"
-#include "ui/aura/window.h"
-
-namespace gfx {
-class Display;
-class Rect;
-}
-
-namespace aura {
-class Window;
-namespace client {
-
-// An interface implemented by an object that changes coordinates within a root
-// Window into system coordinates.
-class AURA_EXPORT ScreenPositionClient {
- public:
-  virtual ~ScreenPositionClient() {}
-
-  // Converts the |screen_point| from a given |window|'s coordinate space
-  // into screen coordinate space.
-  virtual void ConvertPointToScreen(const Window* window,
-                                    gfx::Point* point) = 0;
-  virtual void ConvertPointFromScreen(const Window* window,
-                                      gfx::Point* point) = 0;
-  // Converts the |screen_point| from root window host's coordinate of
-  // into screen coordinate space.
-  // A typical example of using this function instead of ConvertPointToScreen is
-  // when X's native input is captured by a drag operation.
-  // See the comments for ash::GetRootWindowRelativeToWindow for details.
-  virtual void ConvertHostPointToScreen(Window* root_window,
-                                        gfx::Point* point) = 0;
-  // Sets the bounds of the window. The implementation is responsible
-  // for finding out and translating the right coordinates for the |window|.
-  virtual void SetBounds(Window* window,
-                         const gfx::Rect& bounds,
-                         const gfx::Display& display) = 0;
-};
-
-// Sets/Gets the activation client on the Window.
-AURA_EXPORT void SetScreenPositionClient(Window* root_window,
-                                         ScreenPositionClient* client);
-AURA_EXPORT ScreenPositionClient* GetScreenPositionClient(
-    const Window* root_window);
-
-}  // namespace clients
-}  // namespace aura
-
-#endif  // UI_AURA_SCREEN_POSITION_CLIENT_H_