It is time.

ui/aura/scoped_window_targeter.cc

-// 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.
-
-#include "ui/aura/scoped_window_targeter.h"
-
-#include "ui/aura/window.h"
-
-namespace aura {
-
-ScopedWindowTargeter::ScopedWindowTargeter(
-    Window* window,
-    scoped_ptr<ui::EventTargeter> new_targeter)
-    : window_(window),
-      old_targeter_(window->SetEventTargeter(new_targeter.Pass())) {
-  window_->AddObserver(this);
-}
-
-ScopedWindowTargeter::~ScopedWindowTargeter() {
-  if (window_) {
-    window_->RemoveObserver(this);
-    window_->SetEventTargeter(old_targeter_.Pass());
-  }
-}
-
-void ScopedWindowTargeter::OnWindowDestroyed(Window* window) {
-  CHECK_EQ(window_, window);
-  window_ = NULL;
-  old_targeter_.reset();
-}
-
-}  // namespace aura