chromeos: turn on simplified display management for mash

ash/mus/screen_mus_unittest.cc

-// Copyright 2017 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 "ash/mus/screen_mus.h"
-
-#include "ash/mus/window_manager.h"
-#include "ash/mus/window_manager_application.h"
-#include "ash/test/ash_test_base.h"
-#include "ash/test/ash_test_helper.h"
-#include "ui/aura/test/test_window_delegate.h"
-
-namespace ash {
-namespace test {
-
-class ScreenMusTest : public AshTestBase {

[msw, 2017/06/05 23:05:04]

Why remove this now?

[sky, 2017/06/06 00:04:22]

I had to do this now as ScreenMus is no longer created by WindowManager ever.

- public:
-  ScreenMusTest() {}
-  ~ScreenMusTest() override {}
-
-  display::Screen* screen_mus() {
-    return ash_test_helper()->window_manager_app()->window_manager()->screen();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScreenMusTest);
-};
-
-TEST_F(ScreenMusTest, GetWindowAtScreenPoint) {
-  UpdateDisplay("1024x600");
-
-  aura::test::TestWindowDelegate test_delegate;
-  std::unique_ptr<aura::Window> w1(CreateTestWindowInShellWithDelegate(
-      &test_delegate, 23, gfx::Rect(20, 20, 50, 50)));
-
-  aura::Window* at_point =
-      screen_mus()->GetWindowAtScreenPoint(gfx::Point(25, 25));
-  EXPECT_EQ(w1.get(), at_point);
-
-  // Create a second window which overlaps with w1.
-  std::unique_ptr<aura::Window> w2(CreateTestWindowInShellWithDelegate(
-      &test_delegate, 17, gfx::Rect(25, 25, 50, 50)));
-  at_point = screen_mus()->GetWindowAtScreenPoint(gfx::Point(25, 25));
-  EXPECT_EQ(w2.get(), at_point);
-
-  // Raise w1.
-  w1->parent()->StackChildAtTop(w1.get());
-  at_point = screen_mus()->GetWindowAtScreenPoint(gfx::Point(25, 25));
-  EXPECT_EQ(w1.get(), at_point);
-}
-
-}  // namespace test
-}  // namespace ash