It is time.

ui/aura/client/focus_client.cc

-// 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.
-
-#include "ui/aura/client/focus_client.h"
-
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/aura/window_property.h"
-
-DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(AURA_EXPORT, aura::Window*)
-DECLARE_WINDOW_PROPERTY_TYPE(aura::client::FocusClient*)
-
-namespace aura {
-namespace client {
-
-DEFINE_WINDOW_PROPERTY_KEY(FocusClient*, kRootWindowFocusClientKey, NULL);
-
-void SetFocusClient(Window* root_window, FocusClient* client) {
-  DCHECK_EQ(root_window->GetRootWindow(), root_window);
-  root_window->SetProperty(kRootWindowFocusClientKey, client);
-}
-
-FocusClient* GetFocusClient(Window* window) {
-  return GetFocusClient(static_cast<const Window*>(window));
-}
-
-FocusClient* GetFocusClient(const Window* window) {
-  const Window* root_window = window->GetRootWindow();
-  return root_window ?
-      root_window->GetProperty(kRootWindowFocusClientKey) : NULL;
-}
-
-}  // namespace client
-}  // namespace aura