It is time.

ui/views/test/test_widget_observer.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/views/test/test_widget_observer.h"
-
-#include "base/logging.h"
-#include "ui/views/widget/widget.h"
-
-namespace views {
-namespace test {
-
-TestWidgetObserver::TestWidgetObserver(Widget* widget)
-    : widget_(widget) {
-  widget_->AddObserver(this);
-}
-
-TestWidgetObserver::~TestWidgetObserver() {
-  if (widget_)
-    widget_->RemoveObserver(this);
-}
-
-void TestWidgetObserver::OnWidgetDestroying(Widget* widget) {
-  DCHECK_EQ(widget_, widget);
-  widget_ = NULL;
-}
-
-}  // namespace test
-}  // namespace views