It is time.

ui/wm/public/activation_client.cc

Index: ui/wm/public/activation_client.cc
diff --git a/ui/wm/public/activation_client.cc b/ui/wm/public/activation_client.cc
deleted file mode 100644
index 6a475541e667e8c2b0f1f95784e95f8006ae3911..0000000000000000000000000000000000000000
--- a/ui/wm/public/activation_client.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-// 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/wm/public/activation_client.h"
-
-#include "ui/aura/window.h"
-#include "ui/aura/window_property.h"
-
-DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(AURA_EXPORT, aura::Window*)
-DECLARE_WINDOW_PROPERTY_TYPE(aura::client::ActivationClient*)
-
-namespace aura {
-namespace client {
-
-DEFINE_WINDOW_PROPERTY_KEY(
-    ActivationClient*, kRootWindowActivationClientKey, NULL);
-DEFINE_WINDOW_PROPERTY_KEY(bool, kHideOnDeactivate, false);
-
-void SetActivationClient(Window* root_window, ActivationClient* client) {
-  root_window->SetProperty(kRootWindowActivationClientKey, client);
-}
-
-ActivationClient* GetActivationClient(Window* root_window) {
-  return root_window ?
-      root_window->GetProperty(kRootWindowActivationClientKey) : NULL;
-}
-
-void SetHideOnDeactivate(Window* window, bool hide_on_deactivate) {
-  window->SetProperty(kHideOnDeactivate, hide_on_deactivate);
-}
-
-bool GetHideOnDeactivate(Window* window) {
-  return window->GetProperty(kHideOnDeactivate);
-}
-
-}  // namespace client
-}  // namespace aura