It is time.

ui/wm/core/window_util_unittest.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/wm/core/window_util.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/test/aura_test_base.h"
-#include "ui/aura/test/test_windows.h"
-#include "ui/aura/window.h"
-#include "ui/compositor/layer.h"
-#include "ui/compositor/layer_tree_owner.h"
-
-namespace wm {
-
-typedef aura::test::AuraTestBase WindowUtilTest;
-
-// Test if the recreate layers does not recreate layers that have
-// already been acquired.
-TEST_F(WindowUtilTest, RecreateLayers) {
-  scoped_ptr<aura::Window> window1(
-      aura::test::CreateTestWindowWithId(0, NULL));
-  scoped_ptr<aura::Window> window11(
-      aura::test::CreateTestWindowWithId(1, window1.get()));
-  scoped_ptr<aura::Window> window12(
-      aura::test::CreateTestWindowWithId(2, window1.get()));
-
-  ASSERT_EQ(2u, window1->layer()->children().size());
-
-  scoped_ptr<ui::Layer> acquired(window11->AcquireLayer());
-  EXPECT_TRUE(acquired.get());
-  EXPECT_EQ(acquired.get(), window11->layer());
-
-  scoped_ptr<ui::LayerTreeOwner> tree =
-      wm::RecreateLayers(window1.get());
-
-  // The detached layer should not have the layer that has
-  // already been detached.
-  ASSERT_EQ(1u, tree->root()->children().size());
-  // Child layer is new instance.
-  EXPECT_NE(window11->layer(), tree->root()->children()[0]);
-  EXPECT_NE(window12->layer(), tree->root()->children()[0]);
-
-  // The original window should have both.
-  ASSERT_EQ(2u, window1->layer()->children().size());
-  EXPECT_EQ(window11->layer(), window1->layer()->children()[0]);
-  EXPECT_EQ(window12->layer(), window1->layer()->children()[1]);
-
-  // Delete the window before the acquired layer is deleted.
-  window11.reset();
-}
-}  // namespace wm